Okla. Stat. tit. 17, § 17-523: Impairment of existing contract rights or contracting for

correlative rights - Indian property rights.

Nothing herein contained shall be construed to impair existing

contractual rights nor shall it prohibit parties from contracting to

establish correlative rights on the subject matter contained in this

act.

This act shall not be applicable to nor affect in any way

property held by an Indian whose interest is restricted against

voluntary or involuntary alienation under the laws of the United

States or property held by an Indian tribe or by the United States

for any Indian tribe.