43 CFR § 3512.16
How do I sublease my lease?
June 11, 2020
(a) You must file one copy of the sublease between you and the sublessee within 90 days from the date of final execution of the sublease.
(b) The sublessee must also file a signed and dated request for approval and a statement of qualifications (see subpart 3502 of this part), and submit the filing fee for assignment, sublease, or transfer of operating rights found in the fee schedule in §3000.12 of this chapter.
(c) We will notify you with a decision indicating approval or disapproval.
[64 FR 53536, Oct. 1, 1999, as amended at 72 FR 50888, Sept. 5, 2007]