H.R. 6421 would repeal the authority for the Department of Energy (DOE) to establish energy conservation standards for manufactured housing and would prohibit DOE from implementing the rule, “Energy Conservation Program: Energy Conservation Standards for Manufactured Housing,” as published in the Federal Register in May 2022. Manufacturers must comply with that rule at different times depending on the type of home they manufacture; however, CBO expects none would be required to comply until 2025.