77TH CONG. , IST SESS.-CH. 40-APR . 5,1941 economical and in the interests of the Government, and any Govern- ment activity receiving such service shall pay promptly by check upon the written request of the Commissioner of Public Buildings, either in advance or after the service has been furnished, for deposit to the credit of this appropriation, all or part of the estimated or actual cost thereof, as the case may be, and proper adjustment upon the basis of the actual cost shall be made for service paid for in advance. Under the appropriations for salaries and expenses public buildings in and outside the District of Columbia, per diem employees may be paid at rates approved by the Commissioner of Public Buildings, not exceeding current rates for similar services in the place where such services are employed, and such employees in emergencies may be entered on duty subject to confirmation by the Federal Works Administrator. Construction of public buildings, District of Columbia: The Fed- eral Works Administrator is hereby authorized, pursuant to the pro- visions of the Act of May 25, 1926 (44 Stat. 630), as amended, to acquire sites or additional land and to enter into contracts for con- struction of the following public-building projects in amounts not exceeding the following respective limits of cost, which limits of cost shall include salaries, cost of supervision of construction, and inspec- tion, furniture, equipment, moving expenses, extension of steam and water mains and removal or diversion of such sewers and utilities as may be necessary, and all other expenses required solely for the pur- pose of carrying out said public-building projects; and such Admin- istrator is authorized to direct the preparation of all sketches, esti- mates, plans, drawings, and specifications, and to enter into all other contracts necessary for carrying out the purposes hereof; and he is further authorized, when deemed by him desirable and advantageous, to employ by contract or otherwise, temporary professional, technical, or nontechnical employees, firms, or corporations, to such extent as may be necessary to carry out the purposes hereof, without regard to classification laws, or section 3709 of the Revised Statutes: War Department Building: The Commissioner of Public Buildings is hereby authorize to utilize for preliminary expenses and plans and specifications, in connection with the second unit of the War Depart- ment buildings, any unexpended balances of appropriations for the acquisition of site and the construction of the first unit of said buildings. Site and building, west central heating plant, Washington, District of Columbia: For completion of the acquisition of site and construc- tion of a central heating plant in the District of Columbia, $2,400,000. Site and building, General Accounting Office, Washington, District of Columbia: For continuation of the acquisition of site and construc- tion of a building for the General Accounting Office, $5,000,000. Government Printing Office, annex buildings, Washington, District of Columbia: For completion of construction of annex buildings for the Government Printing Office, $200,000. Acquisition of property in the District of Columbia: For the acqui- sition of property within the areas prescribed by the Act of May 25, 1926, as amended, authorizing the Federal Works Administrator to acquire certain lands within the District of Columbia, $700,000. State Department Annex Building: For the acquisition of land as a site for the State Department Annex building in square 167, in the District of Columbia, $920,000. The National Archives Building, installation of facilities: For the purchase and installation of filing and storage equipment in stack areas, changes and additions to the air-conditioning system, and neces- sary structural and mechanical remodeling, $500,000. Per diem employees, pay rates, etc. Construction of public buildings, D.C. 40U.S.C., ch.6. Temporary services. 41U. .C. . 5. War I)epartmllnt BuRilllng. West central heat- ing plant. General Accounting Office. Government Print- ing Office, annex buildings. Acquisition of prop- erty, D. C. 44 Stat. 630. 40U.S.C., ch.6. State Department Annex Building. National Archives Boilding. facilities. 55 STAT.] 107
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