; and (C) shall remain available to the Secretary until expended without further appropriation. (d) Conditions on land exchange (1) Reservation of certain mineral rights Notwithstanding subsection (a), the United States shall reserve the mineral rights on approximately 181 acres of the Federal land parcel as generally depicted on the map entitled Federal Land Parcel–NorthMet Land Exchange , and dated June, 2017. (2) Third-party authorizations As set forth in the Final Record of Decision, Poly Met shall honor existing road and transmission line authorizations on the Federal land parcel. Upon relinquishment of the authorizations by the holders or upon revocation of the authorizations by the Forest Service, Poly Met shall offer replacement authorizations to the holders on at least equivalent terms. 6. Valuation of NorthMet Land Exchange (a) Appraisals The Congress makes the following new findings: (1) Appraisals of the Federal and non-Federal lands to be exchanged in the NorthMet Land Exchange were formally prepared in accordance with the Uniform Appraisal Standards for Federal Land Acquisitions, and were approved by the Secretary in conjunction with preparation of the November 2015 Draft Record of Decision on the NorthMet Land Exchange. (2) The appraisals referred to in paragraph (1) determined that the value of the non-Federal lands exceeded the value of the Federal land parcel by approximately $425,000. (3) Based on the appraisals referred to in paragraph (1), the United States would ordinarily be required to make a $425,000 cash equalization payment to Poly Met to equalize exchange values under the Federal Land Policy and Management Act of 1976 ( 43 U.S.C. 1701 et seq.), unless such an equalization payment is waived by Poly Met. (b) Values for consummation of land exchange The appraised values of the Federal and non-Federal land determined and approved by the Secretary in November 2015, and referenced in subsection (a)— (1) shall be the values utilized to consummate the NorthMet Land Exchange