; and (2) the conveyance of equalization parcels, in accordance with paragraph (5) of the Agreement, shall occur not later than 45 days after the date of the identification of the appraised equalization parcels or portions of parcels to be conveyed to ensure that the exchange is of equal value. 6. Withdrawals (a) Withdrawal of Federal land from mineral entry prior to exchange Subject to valid existing rights, the Federal land and interests in Federal land to be conveyed to the State under section 4(b) are withdrawn from mineral location, entry, and patent under the mining laws pending conveyance of the Federal land and interests in Federal land to the State. (b) Withdrawal of State land conveyed to the United States Subject to valid existing rights, on the date of acquisition by the United States, the State land described in paragraph (2) of the Agreement acquired by the United States under section 4(b), to the extent not subject to previous withdrawals, is permanently withdrawn from all forms of appropriation and disposal under— (1) the public land laws (including the mining and mineral leasing laws)