Okla. Stat. tit. 61, § 127

This act shall apply to contracts made by a public entity operating pursuant to the Local Industrial Development Act or the Local Development Act except where the public improvements, buildings, or repairs are being made or constructed as a part of an agreement to provide development financing assistance, and where the cost of such public improvements does not exceed twenty-five percent (25%) of the total amount of the estimated public and private investment being made within the related increment district.