103 STAT. 862 PUBLIC LAW 101-144 —NOV. 9, 1989 Administration for the comet rendezvous and asteroid flyby and Cassini missions (CRAF/Cassini) if the estimated total budget authority for development of the two spacecraft, through launch plus 30 days of the Csissini mission, exceeds $1,600,000,000. SPACE FUGHT, CONTROL AND DATA COMMUNICATIONS For necessary expenses, not otherwise provided for; in support of space flight, spacecraft control and communications activities of the National Aeronautics and Space Administration, including oper- ations, production, services, minor construction, maintenance, repair, rehabilitation, and modiflcation of real and personal prop- erty; tracking and data relay satellite services as authorized by law; purchase, hire, maintenance and operation of other than adminis- trative aircraft; $4,614,600,000, to remain available until Septem- ber 30, 1991: Provided, That of the funds made available under this heading, $1,400,000,000 is for space transportation system only, which amount shall not become available for obligation until April 15, 1990, and pursuant to section 2020)) of the Balanced Budget and Emergency Deficit Control Reaffirmation Act of 1987, this action is a necessary O^ut secondary) result of a significsint policy change: Provided further, That $75,000,000 of the funds appro- priated in section 101(g) of Public Law 99-591 for orbiter production shall be available until September 30, 1991, for all expenses of this account. CONSTRUCTION OF FACILITIES (INCLUDING TRANSFER OF FUNDS) For construction, repair, rehabilitation and modification of facili- ties, minor construction of new facilities and additions to existing facilities, and for facility planning and design not otherwise pro- vided, for the National Aeronautics and Space Administration, and for the acquisition or condemnation of real property, sis authorized by law, $601,300,000, to remain available until September 30, 1992: Provided, That, notwithstanding the limitation on the availability of funds appropriated under this heading by this appropriations Act, when any activity has been initiated by the incurrence of obligations therefor, the amount available for such activity shall remain avail- able until expended, except that this provision shall not apply to the amounts appropriated pursuant to the authorization for repair, rehabilitation and modification of facilities, minor construction of new facilities and additions to existing facilities, and facility plan- ning and design: Provided further, That no amount appropriated pursuant to this or any otner Act may be used for the lease or construction of a new contractor-funded facility for exclusive use in support of a contract or contracts with the National Aeronautics and Space Administration under which the Administration would be required to substantially amortize through payment or re- imbursement such contractor investment, unless an appropriations Act specifies the lease or contract pursuant to which such facilities are to be constructed or leased or such facility is otherwise identified in such Act: Provided further. That the Administrator may au- thorize such facility lease or construction, if he determines, in consultation with the Committees on Appropriations, that deferral of such action until the enactment of the next appropriations Act
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