25 U.S. Code § 642 - Powers of Tribal Council
To execute mortgages upon, or deeds of trust to, the lands within said Hopi Industrial Park. Such lands shall be subject to foreclosure or sale pursuant to the terms of such mortgage or deed of trust in accordance with the laws of the State of Arizona. The United States shall be an indispensable party to, and may be joined in, any such proceeding involving said lands with the right to remove the action to the United States district court for the district in which the land is situated, according to the procedure in section 1446 of title 28, and the United States shall have the right to appeal from any order of remand entered in such action.
To pledge any revenue or other income from lands within said Hopi Industrial Park, and the improvements situated thereon, and any other revenue or income that may be available to the Hopi Tribe without regard to source, to secure any indebtedness of the Hopi Tribe incurred in the development of said Hopi Industrial Park, and any action to enforce said pledge shall be in accordance with the laws of the State of Arizona, and the United States shall be an indispensable party thereto to the same extent and under the same conditions as hereinbefore provided in the case of mortgage foreclosures.
To issue bonds for and on behalf of the Hopi Tribe, and pay the costs thereof, to accomplish the purposes of this subchapter, in one or more series, in such denomination or denominations, maturing at such time or times, and in such amount or amounts, bearing interest at such rate or rates, in such form either coupon or registered, to be executed in such manner, payable in such medium of payment, at such place or places, subject to such terms of redemption, with or without premium, and containing such other restrictive terms as may be provided by tribal ordinance. Such bonds may be sold at not less than par at either public or private sale and shall be fully negotiable.
To appoint a bank or trust company with its home office in the State of Arizona having an officially reported combined capital, surplus, undivided profits and reserves aggregating not less than $10,000,000 as trustee for all of the purposes provided in the ordinance authorizing and creating any issue of bonds. Any trustee so appointed may be authorized to commence an action for and on behalf of, or on relation of, the Hopi Tribe to enforce any obligation to the tribe pledged to secure payment of the bonds without joining the United States as a party thereto.
To enter into any business venture as a shareholder of a corporation issuing nonassessable stock, or as a limited partner with any corporation, firm or person operating within said Hopi Industrial Park.
To lease lands within the Hopi Industrial Park, any other tribal lands, and the improvements thereon, in accordance with the provisions of Federal laws.