43 CFR § 3515.18
Will I be notified when BLM is considering initiating an exchange that will affect my lease?
June 11, 2020
Yes. The notice you receive will:
(a) State why we believe an exchange would be in the public interest;
(b) Ask whether you are willing to negotiate for an exchange;
(c) Contain a description of the lands for which we would offer exchange terms; and
(d) Ask you to describe the lands on which you would accept a lease in exchange for your present holdings.