43 CFR § 3602.15
What will happen to my bond if I transferred all of my interests or operations to another bonded party?
June 11, 2020
BLM will cancel your bond obligations following approval of the transfer of your interests or operations if the transferee provides a bond that assumes all of your existing liabilities as required in §3602.24. However, under §3602.26, you remain liable for any reclamation or other obligation that accrued during the time you held your interest.