On Dec. 26, 2023, DoD published a proposed rule implementing the CMMC Program (the Proposed Rule). The regulations come more than three years after the release of the initial CMMC regulations (November 2020) and two years after the Biden administration announced the revised “CMMC 2.0” program (January 2021). The Proposed Rule largely reflects the CMMC 2.0 version of the program, although there are important details and clarifications added in the over-200-page rule.