Laws provide the authority for EPA and other executive agencies to write regulations. Regulations explain the technical, operational, and legal details necessary to implement laws.
Before federal agencies can implement a regulation/rule, they must do the following:
All general and permanent rules published in the Federal Register by the Executive departments and agencies of the Federal Government are codifed and made available through the Code of Federal Regulations (CFR). Title 40 (Protection of Environment) of the Code of Federal Regulations (CFR) contains most regulations pertaining to the Environment.