The regulations at 40 CFR part 147 set forth each state's Underground Injection Control (UIC) program and incorporate by reference the rules and regulations that the respective primacy state will implement. This includes codifying programs which EPA directly implements. Codifying state programs in 40 CFR part 147 provides notice to the public and regulated communities of state program requirements and allows EPA to bring a direct enforcement action against a regulated entity if a state asks EPA to intervene or if a state fails to bring an enforcement action. This update is necessary to ensure that the CFR accurately reflects current approved state UIC programs and that requirements of those programs are federally enforceable. The EPA regional offices will be submitting state revision packages as they are completed. 40 CFR part 147 will then be updated in several stages.