40 CFR § 97.287 - Change in regulatory status.
---
identifier: "/us/cfr/t40/s97.287"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 97.287 - Change in regulatory status."
title_number: 40
title_name: "Protection of Environment"
section_number: "97.287"
section_name: "Change in regulatory status."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "97"
part_name: "FEDERAL NOX BUDGET TRADING PROGRAM, CAIR NOX AND SO2 TRADING PROGRAMS, CSAPR NOX AND SO2 TRADING PROGRAMS, AND TEXAS SO2 TRADING PROGRAM"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401, 7403, 7410, 7426, 7491, 7601, and 7651,"
regulatory_source: "65 FR 2727, Jan. 18, 2000, unless otherwise noted. 71 FR 25396, 25422, and 25443, Apr. 28, 2006"
cfr_part: "97"
---
# 97.287 Change in regulatory status.
(a) *Notification.* If a CAIR SO<sub>2</sub> opt-in unit becomes a CAIR SO<sub>2</sub> unit under § 97.204, then the CAIR designated representative shall notify in writing the permitting authority and the Administrator of such change in the CAIR SO<sub>2</sub> opt-in unit's regulatory status, within 30 days of such change.
(b) *Permitting authority's and Administrator's actions.* (1) If a CAIR SO<sub>2</sub> opt-in unit becomes a CAIR SO<sub>2</sub> unit under § 97.204, the permitting authority will revise the CAIR SO<sub>2</sub> opt-in unit's CAIR opt-in permit to meet the requirements of a CAIR permit under § 97.223, and remove the CAIR opt-in permit provisions, as of the date on which the CAIR SO<sub>2</sub> opt-in unit becomes a CAIR SO<sub>2</sub> unit under § 97.204.
(2)(i) The Administrator will deduct from the compliance account of the source that includes the CAIR SO<sub>2</sub> opt-in unit that becomes a CAIR SO<sub>2</sub> unit under § 97.204, CAIR SO<sub>2</sub> allowances equal in amount to and allocated for the same or a prior control period as:
(A) Any CAIR SO<sub>2</sub> allowances allocated to the CAIR SO<sub>2</sub> opt-in unit under § 97.288 for any control period after the date on which the CAIR SO<sub>2</sub> opt-in unit becomes a CAIR SO<sub>2</sub> unit under § 97.204; and
(B) If the date on which the CAIR SO<sub>2</sub> opt-in unit becomes a CAIR SO<sub>2</sub> unit under § 97.204 is not December 31, the CAIR SO<sub>2</sub> allowances allocated to the CAIR SO<sub>2</sub> opt-in unit under § 97.288 for the control period that includes the date on which the CAIR SO<sub>2</sub> opt-in unit becomes a CAIR SO<sub>2</sub> unit under § 97.204, multiplied by the ratio of the number of days, in the control period, starting with the date on which the CAIR SO<sub>2</sub> opt-in unit becomes a CAIR SO<sub>2</sub> unit under § 97.204 divided by the total number of days in the control period and rounded to the nearest whole allowance as appropriate.
(ii) The CAIR designated representative shall ensure that the compliance account of the source that includes the CAIR SO<sub>2</sub> opt-in unit that becomes a CAIR SO<sub>2</sub> unit under § 97.204 contains the CAIR SO<sub>2</sub> allowances necessary for completion of the deduction under paragraph (b)(2)(i) of this section.
[65 FR 2727, Jan. 18, 2000, as amended at 71 FR 74795, Dec. 13, 2006]