30 CFR § 585.635
What must I do if I cease activities approved in my COP before the end of my commercial lease?
July 29, 2020
You must notify the BOEM, within 5 business days, any time you cease commercial operations, without an approved suspension, under your approved COP. If you cease commercial operations for an indefinite period which extends longer than 6 months, we may cancel your lease under §585.437 and, you must initiate the decommissioning process as set forth in subpart I of this part.