PUBLIC LAW 101-516—NOV. 5, 1990 104 STAT. 2157 $1,600,000 shall remain available until expended: Provided, That the unexpended balances of the appropriation "Transportation Planning, Research, and Development associated with commercial space activities shall be transferred to and merged with this appropriation: Provided further. That notwithstanding any other provision of law, there may be credited up to $300,000 to this account funds received from user fees established for regulatory services. WORKING CAPITAL FUND Necessary expenses for operating costs and capital outlays of the Department of Transportation Working Capital Fund not to exceed $86,264,000 shall be paid, in accordance with law, from appropriations made available by this Act and prior appropriations Acts to the Department of Transportation, together with advances and reimbursements received by the Department of Transportation. PAYMENTS TO AIR CARRIERS For payments to air carriers of so much of the compensation fixed and determined under section 419 of the Federal Aviation Act of 1958, as amended (49 U.S.C. 1389), as is payable by the Department of Transportation, $26,600,000, to remain available until expended: Provided, That none of the funds in this or any other Act shall be available for the implementation or execution of programs in excess of $26,600,000 for the Payments to Air Carriers program in fiscal year 1991: Provided further. That this limitation shall only be in effect if contract authority is enacted for the Payments to Air Carriers program for fiscal year 1991. RENTAL PAYMENTS For necessary expenses for rental of headquarters and field space and related services assessed by the General Services Administration, $107,668,000: Provided, That of this amount, $15,108,000 shall be derived from the Highway Trust Fund, $28,508,000 shall be derived from the Airport and Airway Trust Fund, and $419,000 shall be derived from the Pipeline Safety Fund. COASTGUARD OPERATING EXPENSES For necessary expenses for the operation and maintenance of the Coast Guard, not otherwise provided for; purchase of not to exceed eight passenger motor vehicles for replacement only; payments pursuant to section 156 of Public Law 97-377, as amended (42 U.S.C. 402 note), and section 229(b) of the Social Security Act (42 U.S.C. 4290t))); and recreation and welfare; $2,339,839,000 is authorized to be appropriated, derived by transfer, or otherwise provided in "in kind ' commodities and services for Coast Guard operating expenses in fiscal year 1991; of which $2,039,839,000, of which $41,489,000 shall be derived from the Oil Spill Liability Trust Fund is hereby appropriated, of which $35,000,000 shall be expended from the Boat Safety Account, notwithstanding any other provision of law: Provided, That of the funds provided for operating expenses for fiscal year 1991, in this or any other Act, not less than $602,600,000 shall
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