Tenant’s Maintenance Subject to the provisions of Articles Fourteen and Fifteen, Tenant, at its expense, shall keep and maintain the Premises and all Tenant Additions in good order, condition and repair and in accordance with all Laws and Environmental Laws. Tenant shall not permit waste and shall promptly and adequately repair all damages to the Premises and replace or repair all damaged or broken glass in the interior of the Premises, fixtures or appurtenances. Any repairs or maintenance shall be completed with materials of similar quality to the original materials. Any such repairs or maintenance shall be performed only by contractors or mechanics approved by Landlord, which approval shall not be unreasonably withheld, and whose work will not cause or threaten to cause disharmony or interference with Landlord or other tenants in the Building and their respective agents and contractors performing work in or about the Building. If Tenant fails to perform any of its obligations set forth in this Section 8.02, Landlord may, in its sole discretion and upon twenty-four (24) hours’ prior notice to Tenant (except without notice in the case of emergencies), perform the same, and Tenant shall pay to Landlord any costs or expenses incurred by Landlord upon demand.