b. In addition, work shall conform to supplemental sheets which may be issued to approved shop drawings and to approved manufacturer's erection and/or detall draw- ings, insofar as they do not conflict with the above mentioned contract drawings. e. The specifications and accompanying drawings are complementary. Work called for in either of them Shall be executed the same as if called for by both. Errors or inconsistencies in the specifications and/or drawings or the omission from them of work or information necessary to the proper completion of the project shall be reported immediately to the Engineer and his instructions obtained before the work proceeds. ~SC-6. AUTHORITY OF ENGINEER: a. The Engineer shall have the authority to establish lines, grades and controls for construction, and to inspect all work for quality and for compliance with plans and specifications. b. The Engineer shall decide, within the proviSions of the contract, all questions which may arise concerning the quality or acceptability of work performed. He shall have the right to reject materials and workmanShip which he judges to be defective or not in compliance with the plans and specifications, and to require their correction, c, When the terms "as directed", "as required", "approved", or words of similar import are used, it shall be understood that the direction, requirement or approval of the Engineer shall be obtained before work proceeds. SC-7. GOVERNMENT FURNISHED MATERIALS OR EQUIPMENT: a. Under the terms of Article XXIX of the contract, the Contractor may procure from the Armed Forces for use in the work such items of equipment, supplies and material as he deems practical and feasible; and may utilize in the work military aircraft, ships, boats and vehicles of the Armed Forces where he judges the use of such transportation to be practical and feasible. Items of equipment to be furnished by the Armed Forces shall be 80 noted on the drawings. bd. The Commission reserves the right to furnish any materials, equipment, tools or services necessary for the completion of the work. Sc-4