63 STAT.] 81ST CONG., 1IT SESS. -CH. 236-JUNE 23, 1949 Renovation and Modernization, Executive Mansion For all expenses necessary for and incident to the renovation, re- pair, and modernization (without change of present architectural appearance of the exterior of the mansion or the interior of its main floor) of the Executive Mansion, or for such other provision for remodeling or rebuilding the Executive Mansion or for construc- tion of a separate residence for the President as may be determined upon by the Commission on Renovation of the Executive Mansion established pursuant to Public Law 40 (Eighty-first Congress), in- cluding the preparation of drawings and specifications, and the pur- chase of furniture, furnishings, and equipment, without regard to section 3709 of the Revised Statutes or the civil-service and classi- fication laws, $2,000,000, to remain available until expended and, in addition contracts may be entered into in amounts not exceeding $3,400,000: Provided,That any cost-plus-a -fixed-fee general construc- tion contract entered into in pursuance of this authority shall be awarded on competitive bidding among responsible general contrac- tors upon the amount of the fixed fee to accrue from the performance of such contract: Provided further, That with the exception of any subcontract to be made by the general contractor for underpinning and foundation work and work incidental and appurtenant thereto, which may be a cost-plus-a-fixed-fee contract, all other subcontracts made by the general contractor shall be fixed price contracts awarded on competitive bids received from responsible subcontractors. HousING EXPEDITER SALARIES AND EXPENSES For an additional amount for "Salaries and expenses, Office of the Housing Expediter", $2,250,000; and appropriations under this head for the fiscal year 1949 shall be available for the purchase of news- papers (not to exceed $1,600) and for the purchase of one passenger motor vehicle for replacement only. NATIONAL ARCHIVES SALARIES AND EXPENSES The appropriation under this head in the Independent Offices Appro- priation Act, 1949, shall be available for a health service program as authorized by law (5 U. S. C . 150). NATIONAL MEDIATION BOARD ARBITRATION AND EMERGENCY BOARDS For an additional amount for "Arbitration and emergency boards", $36,900. NATIONAL RAILROAD ADJUSTMENT BOARD Salaries and Expenses For an additional amount for "Salaries and expenses", $37,600; and the limitation under this head in the National Mediation Board Appropriation Act, 1949, on the amount available for compensation and expenses of referees, is increased from "$70,000" to "$95,600"; and the limitation under said head on the amount available for other personal services is increased from "$178,000" to "$190,000". 235 Ante, p. 46; post, pp. 740, 891, 976. 41 U.S .. 05. Post, p. 403 . Competitive bid- ding. Subcontracts. 62 Stat. 1197. Ante, p. 79 . 62 Stat. 189. 60 Stat. 90. 62 Stat. 405 .