until expended: Provided, That funds available for implementation, execution, or administration of motor carrier safety operations and programs authorized under title 49, United States Code, shall not exceed total obligations of $435,000,000, for Motor Carrier Safety Operations and Programs for fiscal year 2024, of which $60,000,000 is to be transferred and made available from prior year unobligated contract authority provided for Motor Carrier Safety Grants or Motor Carrier Safety Operations and Programs in the current or prior appropriations or authorization Acts: Provided further, That of the sums appropriated under this heading: (1) $14,073,000, to remain available for obligation until September 30, 2026, is for the research and technology program