43 C.F.R. § 2564.4
The townsite trustee will note a proper reference to the Act of May 25, 1926, on each deed which is issued under authority of that act and each such deed shall provide that the title conveyed is inalienable except upon approval of the Secretary of the Interior or his authorized representative, and that the issuance of the restricted deed does not subject the tract to taxation, to levy and sale in satisfaction of the debts, contracts or liabilities of the transferee, or to any claims of adverse occupancy or law of prescription; also, if the established streets and alleys of the townsite have been extended upon and across the tract, that there is reserved to the townsite the area covered by such streets and alleys as extended. The deed shall further provide that the approval by the Secretary of the Interior or his authorized representative of a sale by the Indian or Eskimo transferee shall vest in the purchaser a complete and unrestricted title from the date of such approval.
43 C.F.R. §2564.4