Who enforces the Surface Mining Control and Reclamation Act of 1977?

In 1974 and 1975 Congress sent mining regulation bills to President Gerald Ford, but he vetoed them out of concern that they would harm the coal industry, increase inflation, and restrict the energy supply. As Jimmy Carter campaigned in Appalachia in 1976, he promised to sign those bills. Congress sent him a bill that was even more stringent than those vetoed by Ford, and President Carter signed it into law on August 3, 1977.