(a) Unless the lease provides otherwise, the lessee must notify all Indian landowners of the proposed leasehold mortgage.

(b) The Indian landowners, or their representatives under § 162.013, must consent to a leasehold mortgage of a business lease in the same percentages and manner as a new business lease under § 162.012, unless the lease:

(1) States that landowner consent is not required for a leasehold mortgage and identifies what law would apply in case of foreclosure;

(2) Provides that individual Indian landowners are deemed to have consented where they do not object in writing to the leasehold mortgage within a specified period of time following the landowners' receipt of the leasehold mortgage and the lease meets the requirements of paragraph (c) of this section;

(3) Authorizes one or more representatives to consent to a leasehold mortgage on behalf of all Indian landowners; or

(4) Designates us as the Indian landowners' representative for the purposes of consenting to a leasehold mortgage.

(c) If the lease provides for deemed consent under paragraph (b)(2) of this section, it must require the parties to submit to us:

(1) A copy of the executed leasehold mortgage or other documentation of any Indian landowners' actual consent;

(2) Proof of mailing of the leasehold mortgage to any Indian landowners who are deemed to have consented; and

(3) Any other pertinent information for us to review.