Okla. Stat. tit. 3 § 65.11
Any acquisition of property heretofore made, within or without the limits of any municipality of the state, for the purposes authorized by this act, and any other action heretofore taken by a municipality in furtherance of such purposes, including but not limited to the making of appropriations, the expenditure of money, the incurring of debts, the acceptance and disbursement of federal, state or other grants or loans, the issuance and payment of bonds and notes, the execution of leases and contracts, which acquisition or action would have been authorized had this act been in effect at the time of such acquisition or action, is hereby ratified and made valid. All bonds and notes heretofore issued in furtherance of purposes authorized by this act and actions ratified by this section are confirmed as legal obligations of the municipality, and, without prejudice to the general powers granted to the municipality by this act, such municipality is hereby authorized to issue further bonds and notes for such purposes up to the limit fixed in the original authorization therefor, which bonds and notes shall be legal obligations in accordance with their terms.
Okla. Stat. tit. 3, § 65.11