25 CFR §162.354

1. (a)Unless the lease provides otherwise, the lessee must notify all Indian landowners of the proposed sublease.
2. (b)The Indian landowners must consent to a sublease of a residential lease in the same percentages and manner as a new residential lease under § 162.012, unless the lease:
   1. (1)Provides that individual Indian landowners are deemed to have consented where they do not object in writing to the sublease within a specified period of time following the landowners' receipt of the sublease and the lease meets the requirements of paragraph (c) of this section;
   2. (2)Authorizes one or more of the Indian landowners to consent on behalf of all Indian landowners; or
   3. (3)Designates us as the Indian landowners' representative for the purposes of consenting to a sublease.
3. (c)If the lease provides for deemed consent under paragraph (b)(1) of this section, it must require the parties to submit to us:
   1. (1)A copy of the executed sublease or other documentation of any landowner's actual consent;
   2. (2)Proof of mailing of the sublease to any Indian landowners who are deemed to have consented; and
   3. (3)Any other pertinent information for us to review.
4. (d)The lessee must obtain the consent of any mortgagees.