Section 90.05-20 - Applicability to offshore supply vessels(a) Existing offshore supply vessels as defined by § 90.10-40(b) , if they are of 100 GRT (100 GT ITC if GRT is not assigned) as defined in § 125.160 of this chapter or more, are subject to inspection under this subchapter. New offshore supply vessels as defined by § 90.10-40(c) , are subject to inspection under subchapter L of this chapter.(b) Each offshore supply vessel permitted grandfathering under paragraph (a) of this section must have completed construction and have a Certificate of Inspection by-(1) March 16, 1998, if the vessel is of less than 500 GRT (6,000 GT ITC if GRT is not assigned) as defined in § 125.160 of this chapter; or(2) August 18, 2016, if the vessel is of at least 6,000 GT ITC (500 GRT if GT ITC is not assigned) as defined in § 125.160 of this chapter.CGD 82-004 and CGD 86-074, 62 FR 49321, Sept. 19, 1997, as amended by USCG-2012-0208, 79 FR 48925 , Aug. 18, 2014