FUND) Of the unobligated balances of funds provided in the Transportation Equity Act for the 21st Century ( Public Law 105–178 ), SAFETEA-LU ( Public Law 109–59 ), or other appropriation or authorization acts prior to fiscal year 2017 for motor carrier safety operations and programs, $13,914,757 is hereby permanently rescinded. MOTOR CARRIER SAFETY (RESCISSION) (HIGHWAY TRUST FUND) Of the unobligated balances of funds provided in the Transportation Equity Act for the 21st Century ( Public Law 105–178 ) or other appropriation or authorization acts prior to fiscal year 2017 for the motor carrier safety program, $2,929,772 is hereby permanently rescinded. NATIONAL MOTOR CARRIER SAFETY (RESCISSION) (HIGHWAY TRUST FUND) Of the unobligated balances of funds provided in the Transportation Equity Act for the 21st Century ( Public Law 105–178 ) or other appropriation or authorization acts prior to fiscal year 2017 for the national motor carrier safety program, $9,419,390 is hereby permanently rescinded. Motor carrier safety grants (liquidation of contract authorization) (limitation on obligations) (highway trust fund) For payment of obligations incurred in carrying out sections 31102, 31103, 31104, and 31313 of title 49, United States Code, as amended by the Fixing America's Surface Transportation Act, $374,800,000, to be derived from the Highway Trust Fund (other than the Mass Transit Account) and to remain available until expended: Provided , That funds available for the implementation or execution of motor carrier safety programs shall not exceed total obligations of $374,800,000 in fiscal year 2018 for Motor Carrier Safety Grants