30 CFR §581.46

1. (a)A lease or any part thereof may be surrendered by the record title holder by filing a written relinquishment with the Director. A relinquishment shall take effect on the date it is filed subject to the continued obligation of the lessee and the surety to:
   1. (1)Make all payments due, including any accrued rentals and royalties; and
   2. (2)Abandon all operations, remove all facilities, and clear the land to be relinquished to the satisfaction of the Director.
2. (b)Upon relinquishment of a lease, the data and information submitted under the lease will no longer be held confidential and will be available to the public.