(a) The Administrator will calculate the annual allowance allocation for a combustion source based on the data, corrected as necessary, under § 74.20 through § 74.25 as follows:

(1) For combustion sources for which the current promulgated SO2 emissions limit under § 74.25 is greater than or equal to the current allowable SO2 emissions rate under § 74.24, the number of allowances allocated for each year equals:

(2) For combustion sources for which the current promulgated SO2 emissions limit under § 74.25 is less than the current allowable SO2 emissions rate under § 74.24.

(i) The number of allowances for each year ending prior to the effective date of the promulgated SO2 emissions limit equals:

(ii) The number of allowances for the year that includes the effective date of the promulgated SO2 emissions limit and for each year thereafter equals: