Common use of Pricing Grid Clause in Contracts

Pricing Grid. If the Level The Facility Fee The The L/C Fee Rate The Eurodollar The Base Rate Status Is Rate is: Utilization is: Margin is: Margin is: Fee Rate is: ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level I Status 0.100% 0.100% 0.400% 0.400% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level II Status 0.125% 0.125% 0.475% 0.475% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level III Status 0.150% 0.150% 0.600% 0.600% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level IV Status 0.175% 0.200% 0700% 0.700% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level V Status 0.250% 0.250% 0.750% 0.750% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level VI Status 0.6725% 0.500% 1.400% 1.400% 0.400% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Each change in a rating shall be effective as of the date it is announced by the applicable rating agency. In the event that the Xxxxx'x Rating and the S&P Rating fall in consecutive Levels, the rating falling in the lower Level (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. In the event that the Xxxxx'x Rating and the S&P Rating fall in non-consecutive Levels, the Level immediately above the Level in which the lower rating falls (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. SCHEDULE 1 TO COMPLIANCE CERTIFICATE Compliance Calculations for Credit Agreement CALCULATION AS OF ________ __,200_ ------------------------------------------------------------------ --------------------- --------------------------- A. Liens (Sec. 7.9(c), (d), and (g)) ------------------------------------------------------------------ --------------------- --------------------------- ------------------------------------------------------------------ --------------------- ---------------------------

Pricing Grid. If the Level The Facility Fee The The L/C Fee Rate The Eurodollar The Base Rate The Utilization Status Is Fee Rate is: Utilization is: Margin is: Margin is: Fee Rate is: ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ________________________________________________________________________________ Level I Status 0.1000.080% 0.320% 0.000% 0.100% 0.400Status ________________________________________________________________________________ Level II 0.090% 0.4000.360% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- 0.100% Status ________________________________________________________________________________ Level II III 0.100% 0.450% 0.000% 0.100% Status ________________________________________________________________________________ Level IV 0.125% 0.525% 0.000% 0.100% Status ________________________________________________________________________________ Level V 0.150% 0.650% 0.000% 0.125% 0.475Status ________________________________________________________________________________ Level VI 0.200% 0.4750.800% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level III 0.125% Status 0.150% 0.150% 0.600% 0.600% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level IV Status 0.175% 0.200% 0700% 0.700% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level V Status 0.250% 0.250% 0.750% 0.750% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level VI Status 0.6725% 0.500% 1.400% 1.400% 0.400% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ________________________________________________________________________________ Each change in a rating shall be effective as of the date it is announced by the applicable rating agency. In With respect to Nicor Gas, in the event that the Xxxxx'x Moody's Rating and the S&P Rating fall in consecutive Levels, the rating falling ratixx xxxxing in the lower higher Level (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. In the event that the Xxxxx'x Moody's Rating and the S&P Rating fall in non-consecutive Levels, the Level immediately above Xxxxx xmmediately below the Level in which the lower higher rating falls shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. If at any time Nicor Gas has no Moody's Rating or no S&P Rating, the remaining rating shall apply unlexx Xxxxr Gas has neither a Moody's Rating nor a S&P Rating, in which case Level VI shall apply. Xith respect to Nicor, (1) in no event may the Level from time to time applicable to Nicor be higher (with Level I being the highest Level and Level VI being the lowest Level) than the Level then applicable to Nicor Gas, and (2) if at any time Nicor Gas has no S&P Rating, Level VI shall govern for purposes of determining the applicable pricing pursuant to the above pricing gridapply. SCHEDULE 1 TO COMPLIANCE CERTIFICATE Compliance Calculations for Credit Agreement CALCULATION AS OF 2 INITIAL COMMITMENTS Lender Initial Commitment _______________________________________________________ ABN AMRO Bank N.V. 50,000,000 __,200_____________________________________________________ ------------------------------------------------------------------ --------------------- --------------------------- A. Liens JP Morgan Chase Bank 50,000,000 _______________________________________________________ The Bank of New York 33,330,000 _______________________________________________________ KeyBank National Association 33,330,000 _______________________________________________________ Wachovia Bank, N.A. 33,330,000 _______________________________________________________ The Bank of Tokyo-Mitsubishi, Ltd. 29,720,000 Chicago Branch _______________________________________________________ Mizuho Corporate Bank, Ltd. 29,720,000 _______________________________________________________ The Royal Bank of Scotland plc 29,720,000 _______________________________________________________ Landesbank Sachsen Girozentrale 29,720,000 _______________________________________________________ Societe Generale 29,720,000 _______________________________________________________ UFJ Bank Limited 29,720,000 _______________________________________________________ Sumitomo Mitsui Banking Corporation 22,220,000 _______________________________________________________ Banco Bilbao Vizcaya Argentaria S.A. 16,670,000 _______________________________________________________ The Northern Trust Company 16,670,000 _______________________________________________________ Wells Fargo Bank, National 16,670,000 Association _______________________________________________________ Banca di Roma - Chicago Branch 13,890,000 _______________________________________________________ Fifth Third Bank (Sec. 7.9(cChicago), (d)a 8,330,000 Michigan Banking Corporation _______________________________________________________ KBC Bank N.V. 8,330,000 _______________________________________________________ Malayan Banking Berhad Bank 8,330,000 _______________________________________________________ U.S. Bank National Association 8,330,000 _______________________________________________________ Seaway National Bank of Chicago 2,250,000 _______________________________________________________ ADMINISTRATIVE AGENT'S NOTICE AND PAYMENT INFORMATION Loan Repayments, and (g)) ------------------------------------------------------------------ --------------------- --------------------------- ------------------------------------------------------------------ --------------------- ---------------------------Interest, Fees: ABN AMRO Bank N.V. New York, NY ABA # 026009580 F/O ABN AMRO Bank, N.V. Chicago Branch CPU Account # 650-001-0000-00 Reference: Agency Services / Nicor & Nicor Gas Letters of Credit: ABN AMRO Bank N.V. New York, NY ABA # 026009580 F/O ABN AMRO Bank N.V. Chicago Trade Services CPU Account # 000-000-0711-41 Reference: Agency Services / Nicor & Nicor Gas Part B - Notices Notices related to commitments, covenants or extensions of expiry/termination dates: ABN AMRO Bank N.V. 540 West Madison Street, 21st Floor Chicago, IL 60661-2591 Attn: Agenxx Xxxxxxxx X-Xxxx: xxxxxx.xxxxx@xxxxxxx.xxx XXX: 000-000-3611 ABN AMRO Bank N.V. 540 Wexx Xxxxxxx Xxxxxx, 00xx Floor Cxxxxxx, XX 60661-2591 Attn: Credxx Xxxxxxxxxxxxxx X-Xxxx: xxxxxxx.xxxx@xxxxxxx.xxx XXX: 012-992-5111 ABN AMRO Bank N.V. 4400 Pxxx Xxx Xxxxxxx, Xxxxx 0500 Houxxxx, XX 00027

Pricing Grid. If the Level The Facility Fee The The L/C Fee Rate The Eurodollar The Base Rate The Utilization Status Is Fee Rate is: Utilization is: Margin is: Margin is: Fee Rate is: ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ________________________________________________________________________________ Level I Status 0.1000.080% 0.320% 0.000% 0.100% 0.400Status ________________________________________________________________________________ Level II 0.090% 0.4000.360% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- 0.100% Status ________________________________________________________________________________ Level II III 0.100% 0.450% 0.000% 0.100% Status ________________________________________________________________________________ Level IV 0.125% 0.525% 0.000% 0.100% Status ________________________________________________________________________________ Level V 0.150% 0.650% 0.000% 0.125% 0.475Status ________________________________________________________________________________ Level VI 0.200% 0.4750.800% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level III 0.125% Status 0.150% 0.150% 0.600% 0.600% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level IV Status 0.175% 0.200% 0700% 0.700% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level V Status 0.250% 0.250% 0.750% 0.750% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level VI Status 0.6725% 0.500% 1.400% 1.400% 0.400% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ________________________________________________________________________________ Each change in a rating shall be effective as of the date it is announced by the applicable rating agency. In With respect to Nicor Gas, in the event that the Xxxxx'x Moody's Rating and the S&P Rating fall in consecutive Levels, the rating txx xxxxng falling in the lower higher Level (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. In the event that the Xxxxx'x Moody's Rating and the S&P Rating fall in non-consecutive LevelsLevelx, the xxx Level immediately above below the Level in which the lower higher rating falls shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. If at any time Nicor Gas has no Moody's Rating or no S&P Rating, the remaining rating shall appxx xxxxss Nicor Gas has neither a Moody's Rating nor a S&P Rating, in which case Level VI shall axxxx. With respect to Nicor, (1) in no event may the Level from time to time applicable to Nicor be higher (with Level I being the highest Level and Level VI being the lowest Level) than the Level then applicable to Nicor Gas, and (2) if at any time Nicor Gas has no S&P Rating, Level VI shall govern for purposes of determining the applicable pricing pursuant to the above pricing gridapply. SCHEDULE 1 TO COMPLIANCE CERTIFICATE Compliance Calculations for Credit Agreement CALCULATION AS OF 2 INITIAL COMMITMENTS Lender Initial Commitment _______________________________________________________ ABN AMRO Bank N.V. 50,000,000 __,200_____________________________________________________ ------------------------------------------------------------------ --------------------- --------------------------- A. Liens JP Morgan Chase Bank 50,000,000 _______________________________________________________ The Bank of New York 33,330,000 _______________________________________________________ KeyBank National Association 33,330,000 _______________________________________________________ Wachovia Bank, N.A. 33,330,000 _______________________________________________________ The Bank of Tokyo-Mitsubishi, Ltd. 29,720,000 Chicago Branch _______________________________________________________ Mizuho Corporate Bank, Ltd. 29,720,000 _______________________________________________________ The Royal Bank of Scotland plc 29,720,000 _______________________________________________________ Landesbank Sachsen Girozentrale 29,720,000 _______________________________________________________ Societe Generale 29,720,000 _______________________________________________________ UFJ Bank Limited 29,720,000 _______________________________________________________ Sumitomo Mitsui Banking Corporation 22,220,000 _______________________________________________________ Banco Bilbao Vizcaya Argentaria S.A. 16,670,000 _______________________________________________________ The Northern Trust Company 16,670,000 _______________________________________________________ Wells Fargo Bank, National 16,670,000 Assocxxxxxn _______________________________________________________ Banca di Roma - Chicago Branch 13,890,000 _______________________________________________________ Fifth Third Bank (Sec. 7.9(cChicago), (d)a 8,330,000 Michigan Banking Corporation _______________________________________________________ KBC Bank N.V. 8,330,000 _______________________________________________________ Malayan Banking Berhad Bank 8,330,000 _______________________________________________________ U.S. Bank National Association 8,330,000 _______________________________________________________ Seaway National Bank of Chicago 2,250,000 _______________________________________________________ ADMINISTRATIVE AGENT'S NOTICE AND PAYMENT INFORMATION Loan Repayments, and (g)) ------------------------------------------------------------------ --------------------- --------------------------- ------------------------------------------------------------------ --------------------- ---------------------------Interest, Fees: ABN AMRO Bank N.V. New York, NY ABA # 026009580 F/O ABN AMRO Bank, N.V. Chicago Branch CPU Account # 000-000-0789-41 Reference: Agency Services / Nicor & Nicor Gas Letters of Credit: ABN AMRO Bank N.V. New York, NY ABA # 026009580 F/O ABN AMRO Bank N.V. Chicago Trade Services CPU Accxxxx # 005-001-1711-41 Reference: Agency Services / Nicor & Nicor Gas Part B - Notices Notices related to commitments, covenants or extensions of expiry/termination dates: ABN AMRO Bank N.V. 540 West Madison Street, 21st Floor Chicago, IL 60661-2591 Attx: Xxxxxx Xxxxxxxx X-Xxxx: xxxxxx.xxxxx@xxxxxxx.xxx XXX: 312-601-3611 ABN AMRO Bank N.V. 000 Xxxx Xxxxxxx Xxxxxx, 26th Xxxxx Xxxxxxo, IL 60661-2591 Attx: Xxxxxx Xxxxxxxxxxxxxx X-Xxxx: xxxxxxx.xxxx@xxxxxxx.xxx FAX: 312-992-5111 ABN AMRO Bank N.V. 0000 Xxxx Xxx Xxxxxxx, Suite 1000 Xxxxxxx, TX 77027

Pricing Grid. If the Level Subject to the The Subject to the Subject to the Status Is proviso below Utilization proviso below proviso below this grid, the Fee Rate this grid, the this grid, the Facility Fee Rate is: Eurodollar Margin Base Rate Margin is: is: is: ------------------ ------------------- ------------ ------------------- ------------------- ------------------ ------------------- ------------ ------------------- ------------------- Level I Status 0.080% 0.100% 0.420% 0.000% ------------------ ------------------- ------------ ------------------- ------------------- ------------------ ------------------- ------------ ------------------- ------------------- Level II Status 0.100% 0.125% 0.500% 0.000% ------------------ ------------------- ------------ ------------------- ------------------- ------------------ ------------------- ------------ ------------------- ------------------- Level III Status 0.125% 0.125% 0.625% 0.000% ------------------ ------------------- ------------ ------------------- ------------------- Level IV Status 0.150% 0.125% 0.725% 0.000% ------------------ ------------------- ------------ ------------------- ------------------- ------------------ ------------------- ------------ ------------------- ------------------- Level V Status 0.200% 0.250% 0.800% 0.000% ------------------ ------------------- ------------ ------------------- ------------------- ------------------ ------------------- ------------ ------------------- ------------------- Level VI Status 0.600% 0.500% 1.400% 0.475% ------------------ ------------------- ------------ ------------------- ------------------- Each change in a rating shall be effective as of the date it is announced by the applicable rating agency. Until the Borrower receives an S&P Rating, the applicable Level shall be determined based upon the Borrower's Moody's Rating. In the event that the Moody's Ratixx xxx the S&P Rating fall in consecutive Levels, xxx xating falling in the lower Level (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. In the event that the Moody's Rating and the S&P Rating fall in non-consecutive Lexxxx, xhe Level immediately above the Level in which the lower rating falls (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. SCHEDULE 1 (3-Year Credit Agreement) PRICING GRID ------------------ ------------------- ------------ ------------------- ------------------ -------------------- If the Level Subject to the The The Subject to the Subject to the Subject to the Status Is proviso below Utilization proviso below proviso below proviso below this this grid, the Fee Rate this grid, the this grid, the grid, the Base Facility Fee Rate is: L/C Fee Rate The Eurodollar The Base Rate Status Is Rate is: Utilization Eurodollar Rate Margin is: is: Margin is: Margin is: Fee Rate is: ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level I Status 0.100% 0.100% 0.400% 0.400% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level II Status 0.125% 0.125% 0.475% 0.475% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level III Status 0.150% 0.1500.125% 0.600% 0.600% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level IV Status 0.175% 0.2000.125% 0700% 0.700% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level V Status 0.250% 0.250% 0.750% 0.750% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level VI Status 0.67250.500% 0.500% 1.4001.500% 1.4001.500% 0.4000.500% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Each change in a rating shall be effective as of the date it is announced by the applicable rating agency. Until the Borrower receives an S&P Rating, the applicable Level shall be determined based upon the Borrower's Moody's Rating. In the event that the Xxxxx'x Rating and Moody's Ratixx xxx the S&P Rating fall in consecutive Levels, the rating xxx xating falling in the lower Level (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. In the event that the Xxxxx'x Moody's Rating and the S&P Rating fall in non-consecutive LevelsLexxxx, the xhe Level immediately above the Level in which the lower rating falls (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. SCHEDULE 1 TO COMPLIANCE CERTIFICATE Compliance Calculations for Credit Agreement CALCULATION AS OF ________ __,200_ ------------------------------------------------------------------ --------------------- --------------------------- A. Liens (Sec. 7.9(c), (d), and (g)) ------------------------------------------------------------------ --------------------- --------------------------- ------------------------------------------------------------------ --------------------- ---------------------------.

Pricing Grid. If the Level The Facility Fee The The L/C Fee Rate The Eurodollar The Base Rate The Utilization Status Is Fee Rate is: Utilization is: Margin is: Margin is: Fee Rate is: ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- _______________________________________________________________________________ Level I Status 0.1000.060% 0.340% 0.000% 0.100% 0.400Status _______________________________________________________________________________ Level II 0.070% 0.4000.380% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- 0.100% Status _______________________________________________________________________________ Level II III 0.080% 0.470% 0.000% 0.100% Status _______________________________________________________________________________ Level IV 0.100% 0.550% 0.000% 0.100% Status _______________________________________________________________________________ Level V 0.125% 0.675% 0.000% 0.125% 0.475Status _______________________________________________________________________________ Level VI 0.175% 0.4750.825% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level III 0.125% Status 0.150% 0.150% 0.600% 0.600% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level IV Status 0.175% 0.200% 0700% 0.700% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level V Status 0.250% 0.250% 0.750% 0.750% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level VI Status 0.6725% 0.500% 1.400% 1.400% 0.400% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- _______________________________________________________________________________ Each change in a rating shall be effective as of the date it is announced by the applicable rating agency. In the event that the Xxxxx'x Moody's Rating and the S&P Rating fall in consecutive Levels, the rating xxx xxxing falling in the lower higher Level (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. In the event that the Xxxxx'x Moody's Rating and the S&P Rating fall in non-consecutive LevelsLevexx, the xxx Level immediately above below the Level in which the lower higher rating falls (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. If at any time the Borrower has no Moody's Rating or no S&P Rating, the remaining rating shall apxxx xxxess the Borrower has neither a Moody's Rating nor a S&P Rating, in which case Level VI shall xxxxx. SCHEDULE 1 TO COMPLIANCE CERTIFICATE Compliance Calculations for Credit Agreement CALCULATION AS OF 2 INITIAL COMMITMENTS Lender Initial Commitment ___________________________________________________________ ABN AMRO Bank N.V. 40,000,000 __,200_________________________________________________________ ------------------------------------------------------------------ --------------------- --------------------------- A. Liens JP Morgan Chase Bank 40,000,000 ___________________________________________________________ The Bank of New York 26,670,000 ___________________________________________________________ KeyBank National Association 26,670,000 ___________________________________________________________ Wachovia Bank, N.A. 26,670,000 ___________________________________________________________ The Bank of Tokyo-Mitsubishi, Ltd. 23,780,000 Chicago Branch ___________________________________________________________ Mizuho Corporate Bank, Ltd. 23,780,000 ___________________________________________________________ The Royal Bank of Scotland plc 23,780,000 ___________________________________________________________ Landesbank Sachsen Girozentrale 23,780,000 ___________________________________________________________ Societe Generale 23,780,000 ___________________________________________________________ UFJ Bank Limited 23,780,000 ___________________________________________________________ Sumitomo Mitsui Banking Corporation 17,780,000 ___________________________________________________________ Banco Bilbao Vizcaya Argentaria S.A. 13,330,000 ___________________________________________________________ The Northern Trust Company 13,330,000 ___________________________________________________________ Wells Fargo Bank, National Association 13,330,000 ___________________________________________________________ Banca di Roma - Chicago Branch 11,110,000 ___________________________________________________________ Fifth Third Bank (Sec. 7.9(cChicago), (d)a 6,670,000 Michigan Banking Corporation ___________________________________________________________ KBC Bank N.V. 6,670,000 ___________________________________________________________ Malayan Banking Berhad Bank 6,670,000 ___________________________________________________________ U.S. Bank National Association 6,670,000 ___________________________________________________________ Seaway National Bank of Chicago 1,750,000 ___________________________________________________________ ADMINISTRATIVE AGENT'S NOTICE AND PAYMENT INFORMATION Loan Repayments, and (g)) ------------------------------------------------------------------ --------------------- --------------------------- ------------------------------------------------------------------ --------------------- ---------------------------Interest, Fees: ABN AMRO Bank N.V. New York, NY ABA # 026009580 F/O ABN AMRO Bank, N.V. Chicago Branch CPU Account # 000-000-1789-41 Reference: Agency Services / Nicor Gas Letters of Credit: ABN AMRO Bank N.V. New York, NY ABA # 026009580 F/O ABN AMRO Bank N.V. Chicago Trade Services CPU Acxxxxx # 055-001-1711-41 Reference: Agency Services / Nicor Gas Part B - Notices Notices related to commitments, covenants or extensions of expiry/termination dates: ABN AMRO Bank N.V. 540 West Madison Street, 21st Floor Chicago, IL 60661-2591 Atxx: Xxxxxx Xxxxxxxx X-Xxxx: xxxxxx.xxxxx@xxxxxxx.xxx XXX: 312-601-3611 ABN AMRO Bank N.V. 000 Xxxx Xxxxxxx Xxxxxt, 26th Xxxxx Xxxxxgo, IL 60661-2591 Atxx: Xxxxxx Xxxxxxxxxxxxxx X-Xxxx: xxxxxxx.xxxx@xxxxxxx.xxx FAX: 312-992-5111 ABN AMRO Bank N.V. 0000 Xxxx Xxx Xxxxxxx, Suite 0000 Xxxxxxx, TX 77027

Pricing Grid. If the Level The Facility Fee The The L/C Fee ============================================================================================================================= Ratio of Consolidated Total Debt to Consolidated EBITDA Eurodollar Rate The Eurodollar The Margin Base Rate Status Is Rate is: Utilization is: Margin is: Margin is: Commitment Fee Rate is: ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level I Status 0.100% 0.100% 0.400% 0.400% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level II Status 0.125% 0.125% 0.475% 0.475% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level III Status 0.150% 0.150% 0.600% 0.600% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level IV Status 0.175% 0.200% 0700% 0.700% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level V Status 0.250% 0.250% 0.750% 0.750% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level VI Status 0.6725% 0.500% 1.400% 1.400% 0.400% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Each change in a rating ----------------------------------------------------------------------------------------------------------------------------- X LESS THAN 5.5 225.0 125.0 42.5 ----------------------------------------------------------------------------------------------------------------------------- X LESS THAN= 5.5, but GREATER THAN 5.0 200.0 100.0 37.5 ----------------------------------------------------------------------------------------------------------------------------- X LESS THAN= 5.0, but GREATER THAN 4.5 162.5 62.5 37.5 ----------------------------------------------------------------------------------------------------------------------------- X LESS THAN= 4.5, but GREATER THAN 4.0 137.5 37.5 35.0 ----------------------------------------------------------------------------------------------------------------------------- X LESS THAN= 4.0, but GREATER THAN 3.5 112.5 12.5 30.0 ----------------------------------------------------------------------------------------------------------------------------- X LESS THAN= 3.5, but GREATER THAN 3.0 87.5 0.0 25.0 ----------------------------------------------------------------------------------------------------------------------------- X LESS THAN= 3.0 62.5 0.0 20.0 ============================================================================================================================= The Applicable Margin, at any time from and including the Closing Date until the date which is six months after the Closing Date, for (a) the Tranche A Term Loans and the Revolving Loans shall be effective 1.25% as of to Base Rate Loans at such time and 2.25% as to Eurodollar Loans at such time and (b) the Commitment Fee shall be 0.50% at such time. The Applicable Margin, at all times, for Tranche B Term Loans shall be 1.75% for Base Rate Loans and 2.75% for Eurodollar Loans. The Applicable Margin, at all times, for Tranche C Term Loans shall be 2.25% for Base Rate Loans and 3.25% for Eurodollar Loans. The Applicable Margin, at all times, for Tranche D Term Loans shall be 2.75% for Base Rate Loans and 3.75% for Eurodollar Loans. The Applicable Margin, at any time from and after the date it which is announced by six months after the applicable rating agency. In the event that the Xxxxx'x Rating Closing Date, for Tranche A Term Loans, Revolving Loans and the S&P Rating fall in consecutive LevelsCommitment Fee, the rating falling in the lower Level (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing be determined pursuant to the Pricing Grid above pricing gridat such time. In the event At all times that the Xxxxx'x Rating Applicable Margin is determined by reference to the Pricing Grid, "X" refers to the ratio of Consolidated Total Debt to Consolidated EBITDA, which ratio shall be determined based upon the Compliance Certificate delivered pursuant to clause (b) of Section 7.2 and shall remain in effect until such time as the next Compliance Certificate shall be delivered (and, at such time, the Applicable Margin shall change based on such next Compliance Certificate); provided, however, that, if (i) any such Compliance Certificate is not delivered to the Administrative Agent on or prior to the date required pursuant to clause (b) of Section 7.2 and (ii) such Compliance Certificate indicates a ratio of Consolidated Total Debt to Consolidated EBITDA that would result in an Applicable Margin which is greater than the Applicable Margin then in effect, then (A) such greater Applicable Margin shall be deemed to be in effect for all purposes of this Agreement from the date such Compliance Certificate was required to be delivered to the Administrative Agent pursuant to clause (b) of Section 7.2 and (B) in furtherance of the other terms of this proviso, if the Borrower shall have made any payment in respect of interest or fees during the period from the date such Compliance Certificate was required to be delivered to the actual date of delivery of such Compliance Certificate, then the Borrower shall pay in the form of a supplemental payment of interest and/or fees, an amount which equals the difference between the amount of interest and/or fees that would otherwise have been paid determined as if such Compliance Certificate was delivered on the date such Compliance Certificate was required to be delivered and the S&P Rating fall in non-consecutive Levelsamount of such interest and/or fees so paid, which supplemental payment of interest and/or fees shall be due and payable on the Level immediately above the Level in which the lower rating falls (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes actual date of determining the applicable pricing pursuant to the above pricing grid. SCHEDULE 1 TO COMPLIANCE CERTIFICATE delivery of such Compliance Calculations for Credit Agreement CALCULATION AS OF ________ __,200_ ------------------------------------------------------------------ --------------------- --------------------------- A. Liens (Sec. 7.9(c), (d), and (g)) ------------------------------------------------------------------ --------------------- --------------------------- ------------------------------------------------------------------ --------------------- ---------------------------Certificate.

Pricing Grid. If the Level The Facility Fee The The L/C Fee Rate The Eurodollar The Base Rate The Utilization Status Is Fee Rate is: Utilization is: Margin is: Margin is: Fee Rate is: ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- _______________________________________________________________________________ Level I Status 0.1000.060% 0.340% 0.000% 0.100% 0.400Status _______________________________________________________________________________ Level II 0.070% 0.4000.380% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- 0.100% Status _______________________________________________________________________________ Level II III 0.080% 0.470% 0.000% 0.100% Status _______________________________________________________________________________ Level IV 0.100% 0.550% 0.000% 0.100% Status _______________________________________________________________________________ Level V 0.125% 0.675% 0.000% 0.125% 0.475Status _______________________________________________________________________________ Level VI 0.175% 0.4750.825% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level III 0.125% Status 0.150% 0.150% 0.600% 0.600% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level IV Status 0.175% 0.200% 0700% 0.700% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level V Status 0.250% 0.250% 0.750% 0.750% 0.000% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- ------------------ ------------------- ------------ ------------------- ------------------ -------------------- Level VI Status 0.6725% 0.500% 1.400% 1.400% 0.400% ------------------ ------------------- ------------ ------------------- ------------------ -------------------- _______________________________________________________________________________ Each change in a rating shall be effective as of the date it is announced by the applicable rating agency. In the event that the Xxxxx'x Moody's Rating and the S&P Rating fall in consecutive Levels, the rating falling ratxxx xxxling in the lower higher Level (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. In the event that the Xxxxx'x Moody's Rating and the S&P Rating fall in non-consecutive Levels, the Level Xxxxx immediately above below the Level in which the lower higher rating falls (with Level I being the highest Level and Level VI being the lowest Level) shall govern for purposes of determining the applicable pricing pursuant to the above pricing grid. If at any time the Borrower has no Moody's Rating or no S&P Rating, the remaining rating shall apply unlxxx xxx Borrower has neither a Moody's Rating nor a S&P Rating, in which case Level VI shall apply. SCHEDULE 1 TO COMPLIANCE CERTIFICATE Compliance Calculations for Credit Agreement CALCULATION AS OF 2 INITIAL COMMITMENTS Lender Initial Commitment ___________________________________________________________ ABN AMRO Bank N.V. 40,000,000 __,200_________________________________________________________ ------------------------------------------------------------------ --------------------- --------------------------- A. Liens JP Morgan Chase Bank 40,000,000 ___________________________________________________________ The Bank of New York 26,670,000 ___________________________________________________________ KeyBank National Association 26,670,000 ___________________________________________________________ Wachovia Bank, N.A. 26,670,000 ___________________________________________________________ The Bank of Tokyo-Mitsubishi, Ltd. 23,780,000 Chicago Branch ___________________________________________________________ Mizuho Corporate Bank, Ltd. 23,780,000 ___________________________________________________________ The Royal Bank of Scotland plc 23,780,000 ___________________________________________________________ Landesbank Sachsen Girozentrale 23,780,000 ___________________________________________________________ Societe Generale 23,780,000 ___________________________________________________________ UFJ Bank Limited 23,780,000 ___________________________________________________________ Sumitomo Mitsui Banking Corporation 17,780,000 ___________________________________________________________ Banco Bilbao Vizcaya Argentaria S.A. 13,330,000 ___________________________________________________________ The Northern Trust Company 13,330,000 ___________________________________________________________ Wells Fargo Bank, National Association 13,330,000 ___________________________________________________________ Banca di Roma - Chicago Branch 11,110,000 ___________________________________________________________ Fifth Third Bank (Sec. 7.9(cChicago), (d)a 6,670,000 Michigan Banking Corporation ___________________________________________________________ KBC Bank N.V. 6,670,000 ___________________________________________________________ Malayan Banking Berhad Bank 6,670,000 ___________________________________________________________ U.S. Bank National Association 6,670,000 ___________________________________________________________ Seaway National Bank of Chicago 1,750,000 ___________________________________________________________ ADMINISTRATIVE AGENT'S NOTICE AND PAYMENT INFORMATION Loan Repayments, and (g)) ------------------------------------------------------------------ --------------------- --------------------------- ------------------------------------------------------------------ --------------------- ---------------------------Interest, Fees: ABN AMRO Bank N.V. New York, NY ABA # 026009580 F/O ABN AMRO Bank, N.V. Chicago Branch CPU Account # 650-000-0000-00 Reference: Agency Services / Nicor Gas Letters of Credit: ABN AMRO Bank N.V. New York, NY ABA # 026009580 F/O ABN AMRO Bank N.V. Chicago Trade Services CPU Account # 000-000-1711-41 Reference: Agency Services / Nicor Gas Part B - Notices Notices related to commitments, covenants or extensions of expiry/termination dates: ABN AMRO Bank N.V. 540 West Madison Street, 21st Floor Chicago, IL 60661-2591 Attn: Agexxx Xxxxxxxx X-Xxxx: xxxxxx.xxxxx@xxxxxxx.xxx XXX: 000-001-3611 ABN AMRO Bank N.V. 540 Wxxx Xxxxxxx Xxxxxx, 00xx Floor Xxxxxxx, XX 60661-2591 Attn: Crexxx Xxxxxxxxxxxxxx X-Xxxx: xxxxxxx.xxxx@xxxxxxx.xxx XXX: 312-992-5111 ABN AMRO Bank N.V. 4400 Xxxx Xxx Xxxxxxx, Xxxxx 1500 Hoxxxxx, XX 07027