The licensee must notify the Sector Commander, or MSU Commander, with COTP and OCMI duties, in writing, upon receipt of a classification society certification, interim class certificate, or single point mooring classification certificate. [USCG-1998-3884, 71 FR 57651, Sept. 29, 2006, as amended by USCG-2013-0397, 78 FR 39182, July 1, 2013]