PUBLIC LAW 100-17—APR. 2, 1987
101 STAT. 139
stitute highway and transit projects, amounts made available in prior fiscal years, and the availability and reapportionment of funds under subparagraph (E). "(I)
AUTHORIZATION
OF APPROPRIATIONS
FOR TRANSIT
PROJECTS.—There are authorized to be appropriated for liquidation of obligations incurred for substitute transit projects under this paragraph the sums provided in section 4(g) of the Urban Mass Transportation Act of 1964. "(J) DISTRIBUTION OF SUBSTITUTE TRANSIT FUNDS.— "(i) BETWEEN DISCRETIONARY AND APPORTIONED PRO-
GRAMS.—Fifty percent of the funds appropriated for each fiscal year beginning after September 30, 1983, for carrying out substitute transit projects under this paragraph shall be distributed at the discretion of the Secretary. The remaining 50 percent of such funds shall be apportioned in accordance with cost estimates approved by Congress or adjusted by the Secretary. "(ii) FISCAL YEARS I 9 8 5, 1986, AND I 9 8 7 APPORTION-
MENTS.—The Secretary shall make a revised estimate of the cost of completing substitute transit projects under this paragraph and transmit the same to the Senate and the House of Representatives within 10 days subsequent to January 2, 1984, and upon approval by Congress, the Secretary shall use the Federal share of such approved estimate in making apportionments for substitute transit projects for fiscal years 1985, 1986, and 1987. "(iii) FISCAL YEARS I 9 8 8, 1989, 1990, AND 199I APPOR-
TIONMENTS.—The Secretary shall make a revised estimate of the cost of completing substitute transit projects under this paragraph and transmit the same to the Senate and the House of Representatives as soon as practicable after the date of the enactment of the Federal-Aid Highway Act of 1987. Upon approval by Congress, the Secretary shall use the Federal share of such approved estimate in making apportionments for substitute transit projects for fiscal year 1988. If such estimate is not approved by Congress by September 30, 1987, the Secretary shall adjust such estimate in accordance with this clause and use the Federal share of the adjusted estimate in making apportionments for fiscal year 1988. The Secretary shall adjust such estimate annually thereafter in accordance with this clause and shall use the Federal share of such adjusted estimate in making apportionments for substitute transit projects for fiscal years 1989, 1990, and 1991. The adjustments required by this clause shall reflect previous withdrawals of Interstate segments, changes in State estimates in the division of funds between substitute highway and transit projects, amounts made available in prior fiscal years, and the availability and reapportionment of funds under subparagraph (E). "(K) REDUCTION OF INTERSTATE APPORTIONMENT.—
"(i) IN GENERAL.—Unobligated apportionments for the Interstate System in any State where a withdrawal is approved under this paragraph shall, on the date of such approval, be reduced in the proportion that the
49 USC app. 1603.
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