Okla. Stat. tit. 21, § 1290.26
The State of Oklahoma hereby recognizes any valid concealed carry weapons permit or license issued by another state, provided the issuing state recognizes this state's concealed handgun license and the reciprocal state:
4. Does not authorize any weapon to be carried which would be a violation of Oklahoma law.
Any person entering this state in possession of a firearm authorized for concealed carry upon the authority of a reciprocal state is authorized to continue to carry a concealed firearm in this state; provided the firearm remains fully concealed from detection and view, and that upon coming in contact with any peace officer of this state, the person discloses the fact that he or she is in possession of a concealed firearm pursuant to a valid concealed carry weapons permit or license issued in another state.
Laws 1996, HB 2530, c. 191, § 20, emerg. eff. May 16, 1996; Amended by Laws 1998, SB 1181, c. 286, § 7, emerg. eff. July 1, 1998 (superseded document available).