43 CFR § 3213.13
When does relinquishment take effect?
June 11, 2020
(a) If BLM determines your relinquishment request meets the requirements of §§3213.11 and 3213.12, your relinquishment is effective the day we receive it.
(b) Notwithstanding the relinquishment, you and your surety continue to be responsible for:
(1) Paying all rents and royalties due before the relinquishment was effective;
(2) Plugging and abandoning all wells on the relinquished land;
(3) Restoring and reclaiming the surface and other resources; and
(4) Complying with §3200.4.