and such other descriptive data as may be required by the Engineer. No consideration will be given to partial lists submitted from time to time. Approval of materials will be based on manufacturers' published ratings. Any materials, fixtures, and equipment listed which are not in accordance with the specifications requirements may be rejected. 16-15. MATERIAL SCHEDULES - OPTIONS OF THE GOVERNMENT: the Contractor fails to submit for approval within the If specified time, a list of materials, fixtures, and equipment in acoordance with the preceding paragraph, the Engineer will select a complete line of materials, fixtures. and equipment. The selection thus made by the Engineer shall be final and binding, and the items shall be furnishec by the Contractor without change in contract price or time of completion, 16-16. APPROVALS AND DRAWINGS: Each manufacturer providing unit substations, transformers, panelboards, switchboards, intercommunication equipment, and other electrical equipmeni for approval shall submit drawings showing the equipment in its final form to the Engineer for approval. All such equipment thereafter delivered shall be in accord with prin* of drawings as approved by the Engineer. The number cf priv required shall be as designated in the General Conditions of this specification. 16-17. GUARANTEES: All material furnished and installed under this contract shall be new and free from all defects, and shall be guaranteed for a period of one (1) year from date of acceptance of the work. Should any trouble develop during this period, due to defective material or faulty workmanship, this Contractor shall furnish all necessary material and labor to correct the trouble without any cost to the Government. Any defective material or inferior woz. manship noticed at the time of installation shall be corre. immediately to the entire satisfaction of the Engineer. Should the Government desi: PRELIMINARY OPERATIONS: 16-18. system or equipment be the of portion any that demand and and acceptance completion final the to previously operated of the work, this Contractor shall consent and such opera: tion shall be under the supervision and direction of the Engineer. Any additional cost incurred by the demand for preliminary operation of any part of the system or equipmen: shall be submitted to the Engineer for approval. If the additional cost, if any, is warranted, this Contractor sha" be paid by the Government as separate and distinct from any 16-4