16 U.S.C. § 521h — Regulations; contents

The Secretary must issue regulations to carry out the rules in sections 521c to 521i of this title, including specification of— (1) criteria which must be used in making the determination as to what constitutes the public interest; (2) the definition of and the procedure for determining “approximately equal value”; and (3) factors relating to location or size which must be considered about determining the lands to be sold, exchanged, or interchanged under clause (1) of section 521e of this title .