; and (2) any master plan for the area approved by the County. (d) Method of sale or exchange (1) In general The sale or exchange of eligible land under subsection (a) shall be— (A) consistent with subsections (b), (d), and (f) of section 203 and section 206(a) of the Federal Land Policy and Management Act of 1976 ( 43 U.S.C. 1713 , 1716(a)); and (B) conducted through— (i) a sale, which shall be— (I) through a competitive bidding process, under which adjoining landowners are offered the first option, unless otherwise determined by the Secretary; (II) for not less than fair market value, based on an appraisal in accordance with the Uniform Standards of Professional Appraisal Practice; and (III) conducted in accordance with subsection (f); or (ii) subject to paragraph (3), an acre-for-acre exchange for private land located within a Management Priority Area identified under paragraph (4)(A). (2) Mass appraisal Not later than 1 year after the date of enactment of this Act, and every 5 years thereafter, the Secretary shall— (A) conduct a mass appraisal of the eligible land to determine whether any parcel of eligible land is likely valued at equal to or greater than $500 per acre (in 2017 constant dollars, as measured by the Consumer Price Index)