§ 74.28 Allowance allocation for combustion sources becoming opt-in sources on a date other than January 1.

(a) Dates of entry. (1) If an opt-in source provided monthly data under § 74.20, the opt-in source's opt-in permit may become effective at the beginning of a calendar quarter as of January 1, April 1, July 1, or October 1.

(2) If an opt-in source provided annual data under § 74.20, the opt-in source's opt-in permit must become effective on January 1.