33 CFR 143.210 - Letter of compliance.
(a) The Officer in Charge, Marine Inspection, determines whether a mobile offshore drilling unit which does not hold a valid Coast Guard Certificate of Inspection meets the requirements of § 143.205 or § 143.207 relating to design and equipment standards and issues a letter of compliance for each unit which meets the requirements. Inspection of the unit may be required as part of this determination.
(b) A letter of compliance issued under paragraph (a) of this section is valid for one year or until the MODU departs the OCS for foreign operations, whichever comes first.
(c) The owner or operator of a foreign mobile offshore drilling unit requiring a letter of compliance examination must pay the fee prescribed in 46 CFR 2.10-130.