Approval of Requests for Substitution. The District, in its sole discretion and after consultation with the Architect, shall determine whether a proposed substitute item: (i) is equal or better in all material respects to the Specified Item; (ii) will adequately and fully accomplish the intended aesthetics, purposes and/or functions of the Specified Item; and (iii) otherwise satisfies all requirements of this Part 12. Upon determining that a proposed substitute item satisfies all of the foregoing conditions, the District shall approve the request for substitution. The District, in its sole discretion, may, but is not required to, approve a request for substitution of a Specified Item despite the proposed substitute item not fully satisfying all of the foregoing conditions. The District also may impose conditions on the approval of any request for substitution, including, without limitation, the Contractor’s agreement to provide an extended warranty on the substitute item or some other assurance of the compatibility, fitness, quality, durability, or performance of the substitute item. If the District approves a request for substitution of a Specified Item, the approval and all terms and conditions thereof shall be set forth in a Change Order, and execution of such Change Order by the Contractor shall be a condition to it taking or having any effect.