CFR › Title 40 › Part 60 › §60.120540 CFR §60.1205Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)The operating requirements of this subpart apply at all times except during periods of municipal waste combustion unit startup, shutdown, or malfunction.(b)Each startup, shutdown, or malfunction must not last for longer than 3 hours.