Okla. Stat. tit. 68, § 4311

A. A county, city or town that enters into any contract, memorandum of understanding or other agreement with a person or lawfully recognized business entity while the Oklahoma Quality Events Incentive Act is in force and effect and in reliance upon the provisions of the Oklahoma Quality Events Incentive Act shall receive the payments provided by this act even if the Oklahoma Quality Events Incentive Act ceases to have the force and effect of law at any time subsequent to the execution of such contract, memorandum of understanding or agreement, including any amendments to such documents if the amendments are incorporated and adopted while the Oklahoma Quality Events Incentive Act is in force and effect. B. Any person or lawfully recognized business entity that enters into a contract, memorandum of understanding or other agreement with another person or lawfully recognized business entity while the Oklahoma Quality Events Incentive Act is in force and effect and in reliance upon the provisions of the Oklahoma Quality Events Incentive Act shall have the right to enforce the terms of such contract, memorandum of understanding or agreement with respect to any amount payable pursuant to the terms of the Oklahoma Quality Events Incentive Act as of the date upon which such contract, memorandum of understanding or agreement is executed, including any amendments to such documents if the amendments are incorporated and adopted while the Oklahoma Quality Events Incentive Act is in force and effect.