25 C.F.R. § 84.005
Will the Secretary approve contracts or agreements even where such approval is not required under this part?
No, the Secretary will not approve contracts or agreements that do not encumber tribal lands for a period of seven or more years. Within thirty days after receipt of final, executed documents, the Secretary will return such contracts and agreements with a statement explaining why Secretarial approval is not required. The provisions of the Act will not apply to those contracts or agreements the Secretary determines are not covered by the Act.