Okla. Stat. tit. 62, § 887

The provisions of the Oklahoma Housing Reinvestment Program Act shall cease to be effective January 1, 2013; provided, any exemption granted pursuant to the Oklahoma Housing Reinvestment Program Act prior to January 1, 2013, which will extend for a period of time after such date shall remain eligible for such exemption for the period of time and under the terms and conditions under which it was originally granted.