Okla. Stat. tit. 12, § 718.9
An action to recognize a foreign-country judgment must be commenced within the earlier of the time during which the foreign-country judgment is effective in the foreign country or fifteen (15) years from the date that the foreign-country judgment became effective in the foreign country.
Laws 2009, SB 887, c. 283, § 9, eff. November 1, 2009.