Common use of Notices to Company and Warrant Agent Clause in Contracts

Notices to Company and Warrant Agent. Any notice or demand authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder of any Warrant Certificate to or on the Company shall be sufficiently given or made if sent by certified mail, return receipt requested, or by nationally recognized overnight courier service, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO Communications, Inc. 10000 Xxxxxx Xxxxx Xxxx Xxxxxx, Xxxxxxxx 00000 Facsimile: (000) 000-0000 Attention: General Counsel If the Company fails to maintain such office or agency or fails to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder of any Warrant Certificate to the Warrant Agent shall be sufficiently given if sent by certified mail, return receipt requested, or by nationally recognized overnight courier service, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 Xxxxxx Xxxx Xxx Xxxx, Xxx Xxxx 00000 Facsimile No.: (000) 000-0000 Attention: Warrant Agent for XO Communications, Inc. If the Warrant Agent shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificates, the Warrant Agent shall promptly forward such notice or demand to the Company.

Notices to Company and Warrant Agent. Any notice All notices, requests or demand demands authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder Holder of any Warrant Certificate to or on the Company or the Warrant Agent to be effective shall be sufficiently in writing (including by facsimile or other electronic means), and shall be deemed to have been duly given or made if sent when delivered by certified hand, or two Business Days after being delivered to a recognized courier (whose stated terms of delivery are two business days or less to the destination of such notice), or five Business Days after being deposited in the mail, return receipt requestedor, in the case of facsimile or by nationally recognized overnight courier serviceemail notice, when received, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery ) as follows: XO CommunicationsGulfMark Offshore, Inc. 10000 Xxxxxx Xxxxx 000 Xxxx XxxxxxXxx Xxxxxxx Parkway North, Xxxxxxxx 00000 Suite 400 Houston, Texas 77024 Facsimile: (000) 000-0000 Attention: General Counsel Xxxxx X. Xxxxxxxx Email: xxxxx.xxxxxxxx@xxxxxxxx.xxx If the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder Holder of any Warrant Certificate to the Warrant Agent shall be sufficiently given if sent by certified first-class mail, return receipt requestedpostage prepaid, or by nationally recognized overnight courier servicefacsimile or email notice, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery as follows (the “Warrant Agent Office”): follows: American Stock Transfer & Trust Company 50 Company, LLC 0000 00 Xxxxxx Xxxx Xxx XxxxXxxxxxxx, Xxx Xxxx XX 00000 Facsimile No.: (000) 000-0000 Attention: Xxxxxx Xxxxxxx Email: XXxxxxxx@xxxxxxxxxxxx.xxx The Warrant Agent for XO Communications, Inc. If maintains the Warrant Agent shall receive any notice or demand addressed to Agent’s Principal Office at the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificates, the Warrant Agent shall promptly forward such notice or demand to the Companyabove address.

Notices to Company and Warrant Agent. Any notice All notices, requests or demand demands authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder of any Class A Warrant Certificate to or on the Company to be effective shall be sufficiently in writing (including by facsimile), and shall be deemed to have been duly given or made if sent when delivered by certified hand, or two (2) Business Days after being delivered to a recognized courier (whose stated terms of delivery are two (2) Business Days or less to the destination of such notice), or five (5) days after being deposited in the mail, return receipt requestedfirst class and postage prepaid or, or by nationally recognized overnight courier servicein the case of facsimile notice, when received, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO CommunicationsPrimus Telecommunications Group, Inc. 10000 Incorporated 0000 Xxxxx Xxxxxx Xxxxx Drive, Suite 900 McLean, Virginia 22102 Attention: Xxxx Xxxxxx, Xxxxxxxx 00000 X. XxXxxxxxx Facsimile: (000) 000-0000 Attention: General Counsel If the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder of any Class A Warrant Certificate to or on the Warrant Agent shall be sufficiently given if sent by certified mailin the same manner as notices, return receipt requested, requests or by nationally recognized overnight courier service, demands are to be given or made to or on the Company (as set forth above) addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmedas follows: StockTrans, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 Inc. 00 Xxxx Xxxxxxxxx Xxxxxx Xxxx Xxx XxxxXxxxxxx, Xxx Xxxx Xxxxxxxxxxxx 00000 Facsimile No.Attention: Xxxxxx X. Xxxxxxxx Facsimile: (000) 000-0000 Attention: The Warrant Agent for XO Communications, Inc. If the maintains a Warrant Agent shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant CertificatesOffice at 00 Xxxx Xxxxxxxxx Xxxxxx, the Warrant Agent shall promptly forward such notice or demand to the CompanyXxxxxxx, Xxxxxxxxxxxx 00000.

Notices to Company and Warrant Agent. Any notice or demand communication authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder the Holder of any Warrant Certificate to or on by the Company to the Company or the Warrant Agent, as the case may be, shall be sufficiently given or made if sent by certified mail, return receipt requested, or by nationally recognized overnight courier service, addressed (until another address is filed in writing and delivered in person, mailed by the Company with the Warrant Agent), first-class mail or sent by facsimile transmission with receipt confirmed, or by personal delivery addressed as follows: XO CommunicationsIf to the Company: ITC/\DeltaCom, Inc. 10000 Xxxxxx Xxxxx Xxxx Xxxxxx0000 X.X. Xxxxxxx Drive West Point, Xxxxxxxx 00000 FacsimileGeorgia 31833 Facsimile No.: (000) 000-0000 Attention: General Counsel If to the Warrant Agent: Mellon Investor Services LLC 000 Xxxxxxxx Xxxxxxx, Xxxxx 0000 Xxxxxxx, Xxxxxxx 00000 Attention: Client Services Manager Fax: 000-000-0000 Attention: Relationship Manager With a copy to: Mellon Investor Services LLC 00 Xxxxxxxxxx Xxxx Xxxxxxxxxx Xxxx, Xxx Xxxxxx 00000-0000 Facsimile No.: (000) 000-0000 Attention: General Counsel In case the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of the location or of any change in the location thereof, presentation presentations may be made and notices and demands may be served at the principal office of the Warrant Agent. The Company or the Warrant Agent by notice to the other may designate additional or different addresses for subsequent notices or communications. Any notice pursuant or communication mailed to this Agreement a Holder shall be mailed to such Holder at its address as it appears on the Warrant Register by first-class mail and shall be sufficiently given by to such Holder if so mailed within the Company or by any registered holder time prescribed. Copies of any Warrant Certificate such communication or notice to a Holder shall also be mailed to the Warrant Agent at the same time. Failure to transmit a notice or communication to a Holder as provided herein or any defect in any such notice shall not affect its sufficiency with respect to other Holders. Except for a notice to the Warrant Agent, which is deemed given only when received, and except as otherwise provided in this Agreement, if a notice or communication is mailed in the manner provided in this Section 11, it is duly given, whether or not the addressee receives it. Where this Agreement provides for notice in any manner, such notice may be sufficiently given if sent by certified mail, return receipt requested, or by nationally recognized overnight courier service, addressed (until another address is filed waived in writing by the Warrant Agent Person entitled to receive such notice, either before or after the event, and such waiver shall be the equivalent of such notice. Waivers of notice by Holders shall be filed with the Company)Warrant Agent, but such filing shall not be a condition precedent to the validity of any action taken in reliance upon such waiver. In case by reason of the suspension of regular mail service or by facsimile transmission reason of any other cause it shall be impracticable to give such notice by mail, then such notification as shall be made with receipt confirmed, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 Xxxxxx Xxxx Xxx Xxxx, Xxx Xxxx 00000 Facsimile No.: (000) 000-0000 Attention: Warrant Agent for XO Communications, Inc. If approval of the Warrant Agent shall receive any notice or demand addressed to the Company by the holder of constitute a Warrant Certificate pursuant to the provisions of the Warrant Certificates, the Warrant Agent shall promptly forward such notice or demand to the Companysufficient notification for every purpose hereunder.

Notices to Company and Warrant Agent. Any notice or demand authorized or permitted by this Warrant Agreement to be given or made by the Warrant Agent or by any registered holder of any Warrant Certificate Holder to or on the Company to be effective shall be sufficiently in writing (including by facsimile), and shall be deemed to have been duly given or made if sent when delivered by certified hand, or two (2) Business Days after being delivered to a recognized courier (whose stated terms of delivery are two (2) Business Days or less to the destination of such notice), or five (5) days after being deposited in the mail, return receipt requestedfirst class and postage prepaid or, or by nationally recognized overnight courier servicein the case of facsimile notice, when received, addressed as follows (until another address or facsimile number is filed in writing by the Company with the Warrant Agent)): Dynegy Inc. 000 Xxxxxx Xxxxxx Suite 1400 Houston, or by facsimile transmission with receipt confirmed, or by personal delivery as followsTX 77002 Attention: XO Communications, Inc. 10000 Xxxxxx Xxxxx Xxxx Xxxxxx, Xxxxxxxx 00000 FacsimileGeneral Counsel Fax: (000) 000-0000 Attention: General Counsel If the Company fails to maintain such office or agency or fails to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice or demand pursuant to this Warrant Agreement to be given by the Company or by any registered holder of any Warrant Certificate Holder to the Warrant Agent shall be sufficiently given if sent in the same manner as notices or demands are to be given or made to or on the Company (except for Warrant Exercise Notices, which shall be delivered in accordance with Section 7) to the Warrant Agent at the office maintained by certified mail, return receipt requested, or by nationally recognized overnight courier service, addressed the Warrant Agent (the “Warrant Agent Office”) as follows (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery as follows (which other address shall become the “address of the Warrant Agent Office”Office for the purposes of this Agreement): American Stock Transfer & Trust Company 50 Computershare 000 Xxxxxxxxxx Xxxx. Xxxxxx Xxxx Xxx Xxxx, Xxx Xxxx Xxxxxx, 00000 Facsimile NoAttention: Corporate Actions Dept., 27th Floor Fax: (000) 000-0000 Attention: Warrant Agent for XO Communications, Inc. If the Warrant Agent shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificates, the Warrant Agent shall promptly forward such notice or demand to the Company.0000

Notices to Company and Warrant Agent. Any notice All notices, requests or demand demands authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder Holder of any Warrant Certificate to or on the Company or the Warrant Agent to be effective shall be sufficiently in writing (including by telecopy), and shall be deemed to have been duly given or made if sent when delivered by certified hand, or two Business Days after being delivered to a recognized courier (whose stated terms of delivery are two business days or less to the destination such notice), or five days after being deposited in the mail, return receipt requestedor, in the case of facsimile or by nationally recognized overnight courier serviceemail notice, when received, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery ) as follows: XO Communications, Inc. 10000 Halcón Resources Corporation 0000 Xxxxxxxxx Xxxxxx Xxxxx Xxxx Xxxxxx0000 Xxxxxxx, Xxxxxxxx Xxxxx 00000 FacsimileFax: (000) 000-0000 AttentionAttn: General Counsel Xxxxx X. Xxxxxxx Email: xxxxxxxx@xxxxxxxxxxxxxxx.xxx If the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder Holder of any Warrant Certificate to the Warrant Agent shall be sufficiently given if sent by certified first-class mail, return receipt requestedpostage prepaid, or by nationally recognized overnight courier servicefacsimile or email notice, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmedas follows: U.S. Bank National Association 0000 Xxx Xxxxxx Suite 1150 Houston, or by personal delivery as follows (the “Texas 77056 Fax: 000.000.0000 Attn: Xxxxxx X. Xxxxxxx Email: xxxxxx.xxxxxxx@xxxxxx.xxx The Warrant Agent Office”): American Stock Transfer & Trust Company 50 Xxxxxx Xxxx Xxx Xxxx, Xxx Xxxx 00000 Facsimile No.: (000) 000-0000 Attention: Warrant Agent for XO Communications, Inc. If maintains the Warrant Agent shall receive any notice or demand addressed to Agent’s Principal Office at the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificates, the Warrant Agent shall promptly forward such notice or demand to the Companyabove address.

Notices to Company and Warrant Agent. Any notice All notices, demands and other communications provided for or demand authorized by permitted under this Agreement to be given or made by the Warrant Agent or by any registered holder the Holder of any Warrant Certificate to or on the Company shall be sufficiently given or made if sent in writing by hand- delivery, certified first-class mail, return receipt requested, next-day air courier or by nationally recognized overnight courier service, addressed facsimile as follows (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO Communications, Inc. 10000 Xxxxxx ): Mikohn Gaming Corporation 000 Xxxxx Xxxx XxxxxxXxx Xxxxx, Xxxxxxxx XX 00000 Attention: General Counsel Facsimile: (000) 000-0000 With a copy to: Xxxxxxxxx Xxxxxxx, LLP 0000 Xxxxxxxx Xxxxxx, Xxxxx 000 Xxxx Xxxxx Xxxxxx, XX 00000 Attention: General Counsel If Xxxx X. Xxxxxxxxx, Esq. Facsimile: (000) 000-0000 In case the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of the location or of any change in the location thereof, presentation presentations may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to All notices, demands and other communications provided for or permitted under this Agreement to be given or made by the Company or by any registered holder the Holder(s) of any Warrant Certificate to the Warrant Agent shall be sufficiently given if sent made in writing by hand-delivery, certified first-class mail, return receipt requested, next-day air courier or by nationally recognized overnight courier service, addressed facsimile as follows (until another address is filed in writing by the Warrant Agent with the Company)): Firstar Bank, or by facsimile transmission with receipt confirmed, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 N.A. 000 Xxxx 0/xx/ Xxxxxx Xxxx Xxx Xx. Xxxx, Xxx Xxxx 00000 Facsimile No.MN 55101 Facsimile: (000) 000-0000 Attention: Warrant Agent for XO CommunicationsCorporate Trust Department All such notices and communications shall be deemed to have been duly given: when delivered by hand, Inc. If if personally delivered; five Business Days after being deposited in the Warrant Agent shall receive any notice or demand addressed mail, postage prepaid, if mailed; one Business Day after being timely delivered to the Company a next-day air courier; and when receipt is acknowledged by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificatesaddressee, the Warrant Agent shall promptly forward such notice or demand to the Companyif telecopied.

Notices to Company and Warrant Agent. Any notice or demand ------------------------------------ authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder of any Warrant Certificate to or on the Company shall be sufficiently given or made if sent by certified mail, return receipt requested, or by nationally recognized overnight courier service, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO CommunicationsAMF Bowling Worldwide, Inc. 10000 Xxxxxx 0000 XXX Xxxxx Xxxx XxxxxxXxxxxxxx, Xxxxxxxx 00000 FacsimileAttention: General Counsel and Chief Financial Officer Facsimile No.: (000) 000-0000 Attention: General Counsel If the Company fails to maintain such office or agency or fails to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder of any Warrant Certificate to the Warrant Agent shall be sufficiently given if sent by certified mail, return receipt requested, or by nationally recognized overnight courier service, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 Xxxxxx Xxxx follows: Mellon Investor Services LLC 000 Xxxxxxxx, 00xx Xxxxx Xxx Xxxx, Xxx Xxxx 00000 Attention: Relationship Manager Facsimile No.: (000) 000-0000 With a copy to: Mellon Investor Services LLC 00 Xxxxxxxxxx Xxxx Xxxxxxxxxx Xxxx, Xxx Xxxxxx 00000 Attention: General Counsel Facsimile No.: (000) 000-0000 The Warrant Agent for XO Communications, Inc. If the maintains a Warrant Agent shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant CertificatesOffice at: Mellon Investor Services LLC 000 Xxxxxxxx, the Warrant Agent shall promptly forward such notice or demand to the Company00xx Xxxxx Xxx Xxxx, Xxx Xxxx 00000 Attention: Relationship Manager Facsimile No.: (000) 000-0000

Notices to Company and Warrant Agent. Any notice All notices, requests or demand demands authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder of any Class B Warrant Certificate to or on the Company to be effective shall be sufficiently in writing (including by facsimile), and shall be deemed to have been duly given or made if sent when delivered by certified hand, or two (2) Business Days after being delivered to a recognized courier (whose stated terms of delivery are two (2) Business Days or less to the destination of such notice), or five (5) days after being deposited in the mail, return receipt requestedfirst class and postage prepaid or, or by nationally recognized overnight courier servicein the case of facsimile notice, when received, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO CommunicationsPrimus Telecommunications Group, Inc. 10000 Incorporated 0000 Xxxxx Xxxxxx Xxxxx Drive, Suite 900 McLean, Virginia 22102 Attention: Xxxx Xxxxxx, Xxxxxxxx 00000 X. XxXxxxxxx Facsimile: (000) 000-0000 Attention: General Counsel If the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder of any Class B Warrant Certificate to or on the Warrant Agent shall be sufficiently given if sent by certified mailin the same manner as notices, return receipt requested, requests or by nationally recognized overnight courier service, demands are to be given or made to or on the Company (as set forth above) addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmedas follows: StockTrans, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 Inc. 00 Xxxx Xxxxxxxxx Xxxxxx Xxxx Xxx XxxxXxxxxxx, Xxx Xxxx Xxxxxxxxxxxx 00000 Facsimile No.Attention: Xxxxxx X. Xxxxxxxx Facsimile: (000) 000-0000 Attention: The Warrant Agent for XO Communications, Inc. If the maintains a Warrant Agent shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant CertificatesOffice at 00 Xxxx Xxxxxxxxx Xxxxxx, the Warrant Agent shall promptly forward such notice or demand to the CompanyXxxxxxx, Xxxxxxxxxxxx 00000.

Notices to Company and Warrant Agent. Any notice or demand authorized by this Agreement to be given or made by the Warrant Agent or by any the registered holder of any Warrant Certificate to or on the Company shall be sufficiently given or made when received if sent by certified deposited in the mail, return receipt requestedfirst class or registered, or by nationally recognized overnight courier servicepostage prepaid, addressed (until another address is filed in writing by the Company with the Warrant Agent), ) or delivered by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO CommunicationsYingli Green Energy Holding Company Limited No. 3055 Middle Fuxing Road Baoding 070151 People’s Republic of China Facsimile No.: (00) 000 000 0000 Attention: Chief Financial Officer With a copy to: Xxxxxxx Xxxxxxx & Xxxxxxxx LLP ICBC Tower, Inc. 10000 00xx Xxxxx 0 Xxxxxx Xxxxx Xxxx, Xxxxxxx Xxxx Xxxxxx, Xxxxxxxx 00000 FacsimileXxxx Xxxxxxxxx No.: (000) 000-0000 0000 Attention: General Counsel If Xx. Xxxxxxx Xxxx In case the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of the location or of any change in the location thereof, presentation presentations may be made and notices and demands may be served at the principal corporate trust office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any the registered holder holder(s) of any Warrant Certificate to the Warrant Agent or the Warrant Registrar shall be sufficiently given when and if sent by certified deposited in the mail, return receipt requestedfirst-class or registered, or by nationally recognized overnight courier servicepostage prepaid, addressed (until another address is filed in writing by the Warrant Agent or the Warrant Registrar, as the case may be, with the Company), or delivered by facsimile transmission with receipt confirmedfacsimile, or to and received by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 Xxxxxx Xxxx Xxx Xxxx, Xxx Xxxx 00000 Facsimile No.: (000) 000-0000 Attention: Warrant Agent for XO Communications, Inc. If the Warrant Agent shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant CertificatesRegistrar, as the Warrant Agent shall promptly forward such notice or demand to the Company.case may be, at its respective office as follows:

Notices to Company and Warrant Agent. Any notice or demand authorized by this Agreement to be given or made by the Warrant Agent or the Warrant Registrar or by any the registered holder of any Warrant Certificate to or on the Company shall be sufficiently given or made when received if sent by certified deposited in the mail, return receipt requestedfirst class or registered, or by nationally recognized overnight courier servicepostage prepaid, addressed (until another address is filed in writing by the Company with the Warrant Agent), Agent or Warrant Registrar) or delivered by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO CommunicationsThe Company: China Natural Gas, Inc. 10000 Xxxxxx Xxxxx Xxxx Xxxxxx19th Floor, Xxxxxxxx 00000 FacsimileVan Metropolis B, Tangyan RD, Hi-tech Zone, Xi'an 710065 P.R. China Attention: (000) 000Chief Financial Officer Facsimile No.: +00-0000 0000 China Natural Gas, Inc. 90 Xxxx Xxx Xxxxx# 0000 New York, NY 10016 Attention: General Counsel If the Company fails to maintain such office or agency or fails to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Txxxxx Xxxxx Facsimile No.: +0 000 000 – 7371 Any notice pursuant to this Agreement to be given by the Company or by any the registered holder holder(s) of any Warrant Certificate to the Warrant Agent shall be given in English and shall be sufficiently given when and if sent by certified deposited in the mail, return receipt requestedfirst-class or registered, or by nationally recognized overnight courier servicepostage prepaid, addressed (until another address is filed in writing by the Warrant Agent with the Company), or delivered by facsimile transmission with receipt confirmedfacsimile, or to and received by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 Xxxxxx Xxxx Xxx Xxxx, Xxx Xxxx 00000 Facsimile No.: (000) 000-0000 Attention: Warrant Agent for XO Communications, Inc. If the Warrant Agent shall receive at its corporate trust office as follows: Deutsche Bank AG, Hong Kong Branch 40xx Xxxxx, Xxxxxx Xxxx Center 2 Xxxxx’x Xxxx Central Hong Kong Attention: The Managing Director Facsimile No: +000 0000 0000 Any notice pursuant to this Agreement to be given by the Company or by the registered holder(s) of any notice or demand addressed Warrant to the Company Warrant Registrar shall be given in English and shall be sufficiently given when and if deposited in the mail, first-class or registered, postage prepaid, addressed (until another address is filed in writing by the holder of a Warrant Certificate pursuant Registrar with the Company), or delivered by facsimile, to the provisions of and received by the Warrant CertificatesRegistrar at its corporate trust office as follows: Deutsche Bank Luxembourg S.A. 2, the Warrant Agent shall promptly forward such notice or demand to the Company.Xxxxxxxxx Xxxxxx Xxxxxxx L-1115 Luxembourg Attntion: Coupon Payment Department Facsimile No: 300-000-000 With copy to: Deutsche Bank AG, Hong Kong Branch 40xx Xxxxx, Xxxxxx Xxxx Center 2 Xxxxx’x Xxxx Central Hong Kong Attention: The Managing Director Facsimile No: +000 0000 0000

Notices to Company and Warrant Agent. Any notice All notices, requests or demand demands authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder Holder of any Warrant Certificate to or on the Company or the Warrant Agent to be effective shall be sufficiently in writing (including by telecopy), and shall be deemed to have been duly given or made if sent when delivered by certified hand, or two Business Days after being delivered to a recognized courier (whose stated terms of delivery are two business days or less to the destination such notice), or five Business Days after being deposited in the mail, return receipt requestedor, in the case of facsimile or by nationally recognized overnight courier serviceemail notice, when received, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery ) as follows: XO Communications, Inc. 10000 AMPLIFY ENERGY CORP. 000 Xxxxxx Xxxxx Xxxx Xxxxxx, Xxxxxxxx Xxxxx 0000 Xxxxxxx, XX 00000 Facsimile: (000) 000-0000 Attention: General Counsel E-mail: xxxxx_xxxxxxx@xxxxxxxxxxxxx.xxx If the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder Holder of any Warrant Certificate to the Warrant Agent shall be sufficiently given if sent by certified first-class mail, return receipt requestedpostage prepaid, or by nationally recognized overnight courier servicefacsimile or email notice, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery as follows (the “Warrant Agent Office”): follows: American Stock Transfer & Trust Company 50 Xxxxxx Company, LLC 00 Xxxx Xxxxxx, 00xx Xxxxx Xxx Xxxx, Xxx Xxxx XX 00000 Facsimile No.: (000) 000-0000 Attention: Legal Department Email: xxxxxxxxxXXX@xxxxxxx.xxx The Warrant Agent for XO Communications, Inc. If maintains the Warrant Agent shall receive any notice or demand addressed to Agent’s Principal Office at the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificates, the Warrant Agent shall promptly forward such notice or demand to the Companyabove address.

Notices to Company and Warrant Agent. Any notice ------------------------------------ or demand authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder of any Warrant Certificate Holder to or on the Company shall be sufficiently given delivered in person or made if sent by certified facsimile transmission, by courier guaranteeing overnight delivery or mailed by first-class mail or registered mail, return receipt requestedpostage prepaid, or by nationally recognized overnight courier service, addressed (i) to the Company (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery ) as follows: XO Communications, Inc. 10000 Houston Biotechnology Incorporated 0000 Xxxxxxxx Xxxxxx Xxxxx Xxxx XxxxxxXxx Xxxxxxxxx, Xxxxxxxx Xxxxx 00000 FacsimileTelecopy: (000) 000-0000 Attention: General Counsel If the Company fails to maintain such office or agency or fails to give such notice of any change in the location thereof, presentation may be made Chief Financial Officer and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder of any Warrant Certificate (ii) to the Warrant Agent shall be sufficiently given if sent by certified mail, return receipt requested, or by nationally recognized overnight courier service, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery ) as follows (the “Warrant Agent Office”): American Stock Transfer & follows: Mellon Securities Trust Company 50 Xxxxxx Xxxx 000 Xxxxxxxx, 00xx Xxxxx Xxx Xxxx, Xxx Xxxx 00000 Facsimile No.: (000) 000-0000 Attention: Warrant Agent for XO Communications, Inc. If Any notice pursuant to this Agreement by the Company or the Warrant Agent to any Holder shall receive any notice be in writing and shall be mailed by first-class mail, postage prepaid, or demand addressed otherwise delivered to the Company by the holder of a Warrant Certificate pursuant to the provisions of such Holder at its address on the Warrant CertificatesRegister. Notices delivered personally shall be effective at the time delivered by hand, notices sent by mail shall be effective four days after mailing, notices sent by facsimile transmission shall be effective when receipt is acknowledged and notices sent by courier guaranteeing next day delivery shall be effective on the Warrant Agent shall promptly forward next business day after timely delivery to such notice or demand to the Companycourier.

Notices to Company and Warrant Agent. Any notice All notices, requests or demand demands authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder of any Class B Warrant Certificate to or on the Company to be effective shall be sufficiently in writing (including by facsimile), and shall be deemed to have been duly given or made if sent when delivered by certified hand, or two (2) Business Days after being delivered to a recognized courier (whose stated terms of delivery are two (2) Business Days or less to the destination of such notice), or five (5) days after being deposited in the mail, return receipt requestedfirst class and postage prepaid or, or by nationally recognized overnight courier servicein the case of facsimile notice, when received, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO CommunicationsPrimus Telecommunications Group, Inc. 10000 Incorporated 0000 Xxxxx Xxxxxx Xxxxx Drive, Suite 900 XxXxxx, Virginia 22102 Attention: Xxxx Xxxxxx, Xxxxxxxx 00000 X. XxXxxxxxx Facsimile: (000) 000-0000 Attention: General Counsel If the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder of any Class B Warrant Certificate to or on the Warrant Agent shall be sufficiently given if sent by certified mailin the same manner as notices, return receipt requested, requests or by nationally recognized overnight courier service, demands are to be given or made to or on the Company (as set forth above) addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmedas follows: StockTrans, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 Inc. 00 Xxxx Xxxxxxxxx Xxxxxx Xxxx Xxx XxxxXxxxxxx, Xxx Xxxx Xxxxxxxxxxxx 00000 Facsimile No.Attention: Xxxxxx X. Xxxxxxxx Facsimile: (000) 000-0000 Attention: The Warrant Agent for XO Communications, Inc. If the maintains a Warrant Agent shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant CertificatesOffice at 00 Xxxx Xxxxxxxxx Xxxxxx, the Warrant Agent shall promptly forward such notice or demand to the CompanyXxxxxxx, Xxxxxxxxxxxx 00000.

Notices to Company and Warrant Agent. Any notice All notices, requests or demand demands authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder of any Warrant Certificate to or on the Company or the Warrant Agent to be effective shall be sufficiently in writing (including by telecopy), and shall be deemed to have been duly given or made if sent when delivered by certified hand, or two Business Days after being delivered to a recognized courier (whose stated terms of delivery are two business days or less to the destination of such notice), or five days after being deposited in the mail, return receipt requestedor, or by nationally recognized overnight courier servicein the case of telecopy notice, when received, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery ) as follows: XO Communicationsc/o Nortek, Inc. 10000 Xxxxxx 00 Xxxxxxx Xxxxx Xxxx XxxxxxProvidence, Xxxxxxxx 00000 RI 02903-2603 Attention: General Counsel Telephone: (000) 000-0000 Facsimile: (000) 000-0000 with a copy to: Weil, Gotshal & Xxxxxx LLP 000 Xxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: General Counsel Xxxxxxx X. Xxxxx, Esq. Telephone: (000) 000-0000 Facsimile: (000) 000-0000 If the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder of any Warrant Certificate to the Warrant Agent shall be sufficiently given if sent by certified first-class mail, return receipt requested, or by nationally recognized overnight courier servicepostage prepaid, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmedas follows: U.S. Bank National Association Xxx Xxxxxxx Xxxxxx, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 Xxxxxx 0xx Xxxxx Xxxxxx, XX 00000 Attention: Xxxx Xxx Xxxx, Xxx Xxxx 00000 Facsimile No.Xxxxxxx Telephone: (000) 000-0000 AttentionFacsimile: Warrant Agent for XO Communications, Inc. If the Warrant Agent shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificates, the Warrant Agent shall promptly forward such notice or demand to the Company.(000) 000-0000

Notices to Company and Warrant Agent. Any notice or demand authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder the Holder of any Warrant Certificate to or on the Company shall be sufficiently given or made five Business Days after being deposited in the mail, first class or registered, postage prepaid; when received if personally delivered; when transmitted if transmitted by telecopy upon receipt of telephonic or electronic confirmation; and the day after it is sent, if sent for next day delivery to a domestic address by certified mail, return receipt requested, or by nationally recognized overnight courier servicedelivery service (e.g., addressed (until another address is filed in writing by the Company with the Warrant AgentFederal Express). In each case, or by facsimile transmission with receipt confirmed, or by personal delivery as followsnotice shall be sent to: XO Communications, Inc. 10000 Crown Castle International Corp. 000 Xxxxxx Xxxxx Xxxx XxxxxxXxxxx 000 Xxxxxxx, Xxxxxxxx XX 00000 FacsimileTelecopier No.: (000) 000-0000 Attention: General Counsel If Chief Financial Officer In case the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of the location or of any change in the location thereof, presentation presentations may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder the Holder(s) of any Warrant Certificate to the Warrant Agent shall be sufficiently given five days after being deposited in the mail, first-class or registered, postage prepaid; when received if personally delivered; when transmitted if transmitted by telecopy upon receipt of telephonic or electronic confirmation; the day after it is sent, if sent for next day delivery to a domestic address by recognized overnight delivery service (e.g., Federal Express); and upon receipt, if sent by certified or registered mail, return receipt requested. In each case, or by nationally recognized overnight courier service, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & notice shall be sent to: United States Trust Company 50 of New York 000 Xxxx 00/xx/ Xxxxxx Xxxx Xxx Xxxx, Xxx Xxxx 00000 Facsimile 00000-0000 Telecopier No.: (000) 000-0000 Attention: Warrant Agent for XO Communications, Inc. If the Warrant Agent shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificates, the Warrant Agent shall promptly forward such notice or demand to the Company.Corporate Trust Administration

Notices to Company and Warrant Agent. Any notice All notices, requests or demand demands authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder Holder of any Warrant Certificate to or on the Company or the Warrant Agent to be effective shall be sufficiently in writing (including by facsimile or other electronic means), and shall be deemed to have been duly given or made if sent when delivered by certified hand, or two Business Days after being delivered to a recognized courier (whose stated terms of delivery are two business days or less to the destination such notice), or five Business Days after being deposited in the mail, return receipt requestedor, in the case of facsimile or by nationally recognized overnight courier serviceemail notice, when received, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery ) as follows: XO CommunicationsGulfMark Offshore, Inc. 10000 Xxxxxx Xxxxx 000 Xxxx XxxxxxXxx Xxxxxxx Parkway North, Xxxxxxxx 00000 Suite 400 Houston, Texas 77024 Facsimile: (000) 000-0000 Attention: General Counsel Xxxxx X. Xxxxxxxx Email: xxxxx.xxxxxxxx@xxxxxxxx.xxx If the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder Holder of any Warrant Certificate to the Warrant Agent shall be sufficiently given if sent by certified first- class mail, return receipt requestedpostage prepaid, or by nationally recognized overnight courier servicefacsimile or email notice, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery as follows (the “Warrant Agent Office”): follows: American Stock Transfer & Trust Company 50 LLC 0000 00 Xxxxxx Xxxx Xxx XxxxXxxxxxxx, Xxx Xxxx XX 00000 Facsimile No.: (000) 000-0000 Attention: Xxxxxx Xxxxxxx Fax: [●] Email: [●] The Warrant Agent for XO Communications, Inc. If maintains the Warrant Agent shall receive any notice or demand addressed to Agent’s Principal Office at the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificates, the Warrant Agent shall promptly forward such notice or demand to the Companyabove address.

Notices to Company and Warrant Agent. Any notice or demand authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder of any Warrant Certificate to or on the Company shall be sufficiently given or made if sent by certified mail, return receipt requested, or by nationally recognized overnight courier service, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO CommunicationsAMF Bowling Worldwide, Inc. 10000 Xxxxxx 0000 XXX Xxxxx Xxxx XxxxxxXxxxxxxx, Xxxxxxxx 00000 FacsimileAttention: General Counsel and Chief Financial Officer Facsimile No.: (000) 000-0000 Attention: General Counsel If the Company fails to maintain such office or agency or fails to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder of any Warrant Certificate to the Warrant Agent shall be sufficiently given if sent by certified mail, return receipt requested, or by nationally recognized overnight courier service, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 Xxxxxx Xxxx follows: Mellon Investor Services LLC 000 Xxxxxxxx, 00xx Xxxxx Xxx Xxxx, Xxx Xxxx 00000 Attention: Relationship Manager Facsimile No.: (000) 000-0000 With a copy to: Mellon Investor Services LLC 00 Xxxxxxxxxx Xxxx Xxxxxxxxxx Xxxx, Xxx Xxxxxx 00000 Attention: General Counsel Facsimile No.: (000) 000-0000 The Warrant Agent for XO Communications, Inc. If the maintains a Warrant Agent shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant CertificatesOffice at: Mellon Investor Services LLC 000 Xxxxxxxx, the Warrant Agent shall promptly forward such notice or demand to the Company00xx Xxxxx Xxx Xxxx, Xxx Xxxx 00000 Attention: Relationship Manager Facsimile No.: (000) 000-0000

Notices to Company and Warrant Agent. Any notice All notices, demands and other communications provided for or demand authorized by permitted under this Agreement to be given or made by the Warrant Agent or by any registered holder the Holder of any Warrant Certificate to or on the Company shall be sufficiently given or made if sent in writing by hand- delivery, certified first-class mail, return receipt requested, next-day air courier or by nationally recognized overnight courier service, addressed facsimile as follows (until another address is filed in writing by the Company with the Warrant Agent)): Orbital Sciences Corporation 21839 Atlantic Boulevard Dulles, or by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO Communications, Inc. 10000 Xxxxxx Xxxxx Xxxx Xxxxxx, Xxxxxxxx 00000 FacsimileVA 20166 Xxxxxxxxx: (000) 000-0000 Attention: General Counsel If Legal Department Xxxh a copy to: Hogan and Hartson, L.L.P. Columbia Square 055 13th Street N.W. Washington, DC 20004 Xxxxxxxxx: (000) 000-0000 Attention: James E. Showen Xx xase the Company fails shall fail to maintain such office mainxxxx xxxx xxxxxe or agency or fails shall fail to give such notice of the location or of any change in the location thereof, presentation presentations may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to All notices, demands and other communications provided for or permitted under this Agreement to be given or made by the Company or by any registered holder the Holder(s) of any Warrant Certificate to the Warrant Agent shall be sufficiently given if sent made in writing by hand- delivery, certified first-class mail, return receipt requested, next-day air courier or by nationally recognized overnight courier service, addressed facsimile as follows (until another address is filed in writing by the Warrant Agent with the Company)): U.S. Bank, or by facsimile transmission with receipt confirmedN.A. 180 East 5th Street St. Paul, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & Trust Company 50 Xxxxxx Xxxx Xxx Xxxx, Xxx Xxxx 00000 Facsimile No.MN 55101 Xxxxxxxxx: (000) 000-0000 Attention: Warrant Agent for XO CommunicationsCorporate Trust Departxxxx All such notices and communications shall be deemed to have been duly given: when delivered by hand, Inc. If if personally delivered; five Business Days after being deposited in the Warrant Agent shall receive any notice or demand addressed mail, postage prepaid, if mailed; one Business Day after being timely delivered to the Company a next-day air courier; and when receipt is acknowledged by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificatesaddressee, the Warrant Agent shall promptly forward such notice or demand to the Companyif telecopied.

Notices to Company and Warrant Agent. Any notice or demand authorized by this Agreement to be given or made by the Warrant Agent or by any the registered holder of any Warrant Certificate to or on the Company shall be sufficiently given or made when and if sent by certified deposited in the mail, return receipt requestedfirst class or registered, or by nationally recognized overnight courier servicepostage prepaid, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO CommunicationsPCA International, Inc. 10000 Xxxxxx Xxxxx 000 Xxxxxxxx-Mint Xxxx XxxxxxRoad Matthews, Xxxxxxxx 00000 FacsimileNorth Carolina 28105 Attention: Chief Financial Officer Facsimile No.: (000) 000-0000 with a copy to: Xxxx, Weiss, Rifkind, Xxxxxxx & Xxxxxxxx 1285 Avenue of the Americas Xxx Xxxx, Xxx Xxxx 00000-0000 Attention: General Counsel If Xxxxxxx Xxxxxxxx, Esq. Facsimile No.: (000) 000-0000 In case the Company fails shall fall to maintain such office or agency or fails shall fall to give such notice of the location or of any change in the location thereof, presentation presentations may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any the registered holder holder(s) of any Warrant Certificate to the Warrant Agent shall be sufficiently given when and if sent by certified deposited in the mail, return receipt requestedfirst-class or registered, or by nationally recognized overnight courier servicepostage prepaid, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery as follows () to the “Warrant Agent Office”): American Stock Transfer & as follows: United States Trust Company 50 Xxxxxx of New York 000 Xxxx 00xx Xxxxxx, 00xx Xxxxx Xxx Xxxx, Xxx Xxxx 00000 Facsimile No.XX 00000-0000 Attention: Corporate Trust Administration Facsimile: (000) 000-0000 Attention: Warrant Agent for XO Communications, Inc. If the Warrant Agent shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificates, the Warrant Agent shall promptly forward such notice or demand to the Company.0000

Notices to Company and Warrant Agent. Any notice or demand authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder of any Warrant Certificate Holder to or on the Company shall be sufficiently given or made as of the date sent if sent by certified mail, return receipt requested, or by nationally recognized overnight courier servicecourier, by first class mail, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery as follows: XO CommunicationsAVEO Pharmaceuticals, Inc. 10000 Xxxxxx Xxx Xxxxxxxx, 00xx Xxxxx Xxxx XxxxxxXxxxxxxxx, Xxxxxxxx XX 00000 FacsimileFax: (000) 000-0000 Attention: General Counsel Chief Financial Officer If the Company fails to maintain such office or agency or fails to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder of any Warrant Certificate Holder to the Warrant Agent shall be sufficiently given as of the date sent if sent by nationally recognized overnight courier or by certified mail, return receipt requested, or by nationally recognized overnight courier service, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery as follows (the “Warrant Agent Office”): American Stock Transfer & follows: Computershare Trust Company 50 Company, N.A. 000 Xxxxxx Xxxx Xxx XxxxXxxxxx Canton, Xxx Xxxx 00000 Facsimile No.Massachusetts 02021 Attn: Client Administration Facsimile: (000) 000-0000 Attention: Warrant Agent for XO Communications, Inc. If Any notice pursuant to this Agreement to be given by the Company or by the Warrant Agent to any Holder shall receive any notice or demand addressed to the Company by the holder of a Warrant Certificate pursuant to the provisions be sufficiently given as of the Warrant Certificatesdate sent if sent by nationally recognized overnight courier or by first class mail, addressed (until another address is filed in writing with the Warrant Agent shall promptly forward Agent) to such notice or demand to Holder’s address appearing on the CompanyWarrant Register.

Notices to Company and Warrant Agent. Any notice All notices, requests or demand demands authorized by this Agreement to be given or made by the Warrant Agent or by any registered holder Holder of any Warrant Certificate to or on the Company or the Warrant Agent to be effective shall be sufficiently in writing (including by telecopy), and shall be deemed to have been duly given or made if sent when delivered by certified hand, or two Business Days after being delivered to a recognized courier (whose stated terms of delivery are two business days or less to the destination such notice), or five Business Days after being deposited in the mail, return receipt requestedor, in the case of facsimile or by nationally recognized overnight courier serviceemail notice, when received, addressed (until another address is filed in writing by the Company with the Warrant Agent), or by facsimile transmission with receipt confirmed, or by personal delivery ) as follows: XO CommunicationsBasic Energy Services, Inc. 10000 000 Xxxxxx Xxxxxx Xxxxx 0000 Xxxx XxxxxxXxxxx, Xxxxxxxx Xxxxx 00000 FacsimileFax: (000) -000-0000 AttentionAttn: General Counsel Xxxx Xxx Email: Xxxxx.Xxx@XxxxxXxxxxxXxxxxxxx.xxx If the Company fails shall fail to maintain such office or agency or fails shall fail to give such notice of any change in the location thereof, presentation may be made and notices and demands may be served at the principal office of the Warrant Agent. Any notice pursuant to this Agreement to be given by the Company or by any registered holder Holder of any Warrant Certificate to the Warrant Agent shall be sufficiently given if sent by certified first-class mail, return receipt requestedpostage prepaid, or by nationally recognized overnight courier servicefacsimile or email notice, addressed (until another address is filed in writing by the Warrant Agent with the Company), or by facsimile transmission with receipt confirmed, or by personal delivery as follows (the “Warrant Agent Office”): follows: American Stock Transfer & Trust Company 50 Company, LLC 0000 00xx Xxxxxx Xxxx Xxx XxxxXxxxxxxx, Xxx Xxxx XX 00000 Facsimile No.Fax: (000) -000-0000 AttentionAttn: Xxx Xxxxxx Email: Xxxxxxxxxxxxx@xxxxxxx.xxx The Warrant Agent for XO Communications, Inc. If maintains the Warrant Agent shall receive any notice or demand addressed to Agent’s Principal Office at the Company by the holder of a Warrant Certificate pursuant to the provisions of the Warrant Certificates, the Warrant Agent shall promptly forward such notice or demand to the Companyabove address.