Section 97.187 - Change in regulatory status(a)Notification. If a CAIR NOX opt-in unit becomes a CAIR NOX unit under § 97.104 , then the CAIR designated representative shall notify in writing the permitting authority and the Administrator of such change in the CAIR NOX opt-in unit's regulatory status, within 30 days of such change.(b)Permitting authority's and Administrator's actions.(1) If a CAIR NOX opt-in unit becomes a CAIR NOX unit under § 97.104 , the permitting authority will revise the CAIR NOX opt-in unit's CAIR opt-in permit to meet the requirements of a CAIR permit under § 97.123 , and remove the CAIR opt-in permit provisions, as of the date on which the CAIR NOX opt-in unit becomes a CAIR NOX unit under § 97.104 .(2)(i) The Administrator will deduct from the compliance account of the source that includes the CAIR NOX opt-in unit that becomes a CAIR NOX unit under § 97.104 , CAIR NOX allowances equal in amount to and allocated for the same or a prior control period as:(A) Any CAIR NOX allowances allocated to the CAIR NOX opt-in unit under § 97.188 for any control period after the date on which the CAIR NOX opt-in unit becomes a CAIR NOX unit under § 97.104 ; and(B) If the date on which the CAIR NOX opt-in unit becomes a CAIR NOX unit under § 97.104 is not December 31, the CAIR NOX allowances allocated to the CAIR NOX opt-in unit under § 97.188 for the control period that includes the date on which the CAIR NOX opt-in unit becomes a CAIR NOX unit under § 97.104 , multiplied by the ratio of the number of days, in the control period, starting with the date on which the CAIR NOX opt-in unit becomes a CAIR NOX unit under § 97.104 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 NOX opt-in unit that becomes a CAIR NOX unit under § 97.104 contains the CAIR NOX allowances necessary for completion of the deduction under paragraph (b)(2)(i) of this section.(3)(i) For every control period after the date on which the CAIR NOX opt-in unit becomes a CAIR NOX unit under § 97.104 , the CAIR NOX opt-in unit will be allocated CAIR NOX allowances under § 97.142 .(ii) If the date on which the CAIR NOX opt-in unit becomes a CAIR NOX unit under § 97.104 is not December 31, the following amount of CAIR NOX allowances will be allocated to the CAIR NOX opt-in unit (as a CAIR NOX unit) under (97.142 for the control period that includes the date on which the CAIR NOX opt-in unit becomes a CAIR NOX unit under § 97.104 : (A) The amount of CAIR NOX allowances otherwise allocated to the CAIR NOX opt-in unit (as a CAIR NOX unit) under § 97.142 for the control period multiplied by;(B) The ratio of the number of days, in the control period, starting with the date on which the CAIR NOX opt-in unit becomes a CAIR NOX unit under § 97.104 , divided by the total number of days in the control period; and(C) Rounded to the nearest whole allowance as appropriate.65 FR 2727, Jan. 18, 2000, as amended at 71 FR 74795, Dec. 13, 2006