Any improvements constituting personal property, as defined by State law, belonging to the holder of a right, contract, lease, permit, or right-of-way on lands transferred under this section shall remain the property of the holder and shall be removed not later than 90 days after the date on which the right, contract, lease, permit, or right-of-way expires, unless the Tribe and the holder agree otherwise. Any such property remaining beyond the 90-day period shall become the property of the Tribe and shall be subject to removal and disposition at the Tribe’s discretion. The holder shall be liable for the costs the Tribe incurs in removing and disposing of the property. (c) Withdrawal of Federal lands (1) In general Subject to valid existing rights, effective on the date of enactment of this Act, all Federal lands within the parcels described in subsection (a)(2) are withdrawn from all forms of— (A) entry, appropriation, or disposal under the public land laws