Okla. Stat. tit. 80, § 80-7: Congress authorized to administer ceded lands

Power is hereby conferred upon Congress of the United States to

pass such laws and to make or provide for the making of such rules

and regulations of both a civil and criminal nature, and provide

punishment therefor, as in its judgment may be necessary for the

administration, control and protection of such lands as may be from

time to time acquired by the United States under the provisions of

this act.