Any property covered by this paragraph which is related to the delivery of hydrogen into the fuel tank of a motor vehicle shall only be eligible for tax years 2010 and 2023 through 2028;
If one of the tax credit pools as described in paragraphs 1 through 3 of this subsection is not fully utilized for the applicable tax year, the remaining balance of that pool shall be allocated to each of the two remaining tax credit pools in equal amounts. If two of the tax credit pools as described in paragraphs 1 through 3 of this subsection are not fully utilized for the applicable tax year, the remaining balances in both pools shall be added together and the sum of those amounts shall be allocated to the remaining tax credit pool.
The Tax Commission shall annually calculate and publish by the first day of the affected taxable year a percentage by which the credits authorized by this section shall be reduced so the total amount of credits used to offset tax does not exceed each of the limits provided in paragraphs 1 through 3 of this subsection. The formula to be used for the percentage adjustment shall be Ten Million Dollars ($10,000,000.00) divided by the credits claimed in the second preceding year, with respect to any changes to the future of the credit.
Okla. Stat. tit. 68, § 2357.22