(1) Calculating the total program allowance budget. Ecology must use the following methods for setting the total program allowance budget for each year. The total program allowance budget for each year must be in units of MT CO2e on a mass basis.

(a) Emissions years 2023 through 2026.

(i) The total program allowance budget for emissions year 2023 is equal to 93 percent of the total program baseline described in WAC 173-446-200 Table 200-1 for 2023 through 2026.

(ii) The total program allowance budget for each year from 2024 through 2026 decreases annually relative to the previous year by an additional seven percent of the total program baseline in WAC 173-446-200 Table 200-1 for 2023 through 2026.

(b) Emissions years 2027 through 2030.

(i) The total program allowance budget for emissions year 2027 is equal to the 2026 total program allowance budget plus the adjustment to the total program baseline described in WAC 173-446-200(3) reduced by an additional seven percent of the total program baseline in WAC 173-446-200 Table 200-1 for 2027 through 2030.

(ii) The total program allowance budget for each year from 2028 through 2030 decreases annually relative to the previous year by an additional seven percent of the total program baseline in WAC 173-446-200 Table 200-1 for 2027 through 2030.

(c) Emissions years 2031 through 2042.

(i) The total program allowance budget for emissions year 2031 is equal to the 2030 total program allowance budget plus the adjustment to the total program baseline described in WAC 173-446-200(4) reduced by an additional one and eight tenths percent of the total program baseline in WAC 173-446-200 Table 200-1 for 2031 and subsequent years.

(ii) The total program allowance budget for each year from 2032 through 2042 decreases annually relative to the previous year by an additional one and eight tenths percent of the total program baseline in WAC 173-446-200 Table 200-1 for 2031 and subsequent years.

(d) Emissions years 2043 through 2049. The total program allowance budget for each year from 2043 through 2049 decreases annually relative to the previous year by an additional two and six tenths percent of the total program baseline in WAC 173-446-200 Table 200-1 for 2031 and subsequent years.

(2) Total program allowance budget. Table 210-1 displays the total program allowance budget for each year calculated using the method established in subsection (1) of this section.