A withdrawal becomes effective within the time frame specified in the resolution that authorizes withdrawal from the participating Tribal organization or inter-Tribal consortium. In the absence of a specific time frame set forth in the resolution, such withdrawal becomes effective on
(a) The earlier of 1 year after the date of submission of such request, or the date on which the funding agreement expires; or
(b) Such date as may be mutually agreed upon by the Secretary, the withdrawing Indian Tribe, and the participating Tribal organization or inter-Tribal consortium that has signed the compact or funding agreement on behalf of the withdrawing Indian Tribe, inter-Tribal consortium, or Tribal organization.