; or (B) the provision of law from which the Federal program included in the Plan derives its authority that is specifically applicable to Indians. (c) Waiver submission and review (1) Determination on waiver request Not later than 45 days after the date on which an Indian Tribe submits a waiver request under subsection (a), the head of the affected agency shall— (A) make a determination on whether to grant or deny the request; and (B) provide written notice of the determination and the reasons for the determination to the requesting Indian Tribe and the Secretary. (2) Deemed approval If the head of an affected agency does not provide written notice to the Indian Tribe of a determination on a waiver request within the 45-day period described in paragraph (1), the waiver request shall be deemed to be granted. (3) Interagency dispute resolution (A) In general On the request of an Indian Tribe that submitted a waiver request under subsection (a), the Secretary shall establish and initiate an interagency dispute resolution process involving— (i) the Secretary; (ii) the Indian Tribe; and (iii) the head of the affected agency. (B) Timeline A dispute initiated under subparagraph (A) shall be resolved not later than 30 days after the date on which the process is initiated under that subparagraph. (C) Final authority If the dispute resolution process fails to resolve the dispute between the Indian Tribe and the affected agency, the head of the affected agency shall have the final authority to resolve the dispute. (D) Notice to indian tribe Not later than 10 days after the date on which the dispute is resolved under this paragraph, the Secretary shall provide the Indian Tribe with— (i) the final determination on the waiver request; and (ii) notice of the right to file an appeal in accordance with section 108(d)(2). 108. Plan approval or denial (a) In general The Secretary shall have the sole and exclusive authority to approve or disapprove— (1) a Plan submitted by an Indian Tribe