CFR›Title 10›Chapter II›Part 431›Subpart S›Subject Group Test Procedures ContainsSections 431.323–431.324CorpusDaily eCFRDisplayed edition2026-05-07Last updated2026-05-07 Sections 431.323 § 431.323 Materials incorporated by reference. 431.324 § 431.324 Uniform test method for the measurement of energy efficiency and standby mode energy consumption of metal halide lamp ballasts. Previous Energy Conservation Standards Energy Conservation Standards