25 U.S.C. § 391 - U.S. Code - Unannotated Title 25. Indians § 391. Continuance of restrictions on alienation in patent

Prior to the expiration of the trust period of any Indian allottee to whom a trust or other patent containing restrictions upon alienation has been or shall be issued under any law or treaty the President may, in his discretion, continue such restrictions on alienation for such period as he may deem best: Provided, however, That this shall not apply to lands in the former Indian Territory.