Section 125.150 - Lifesaving systems(a) Lifesaving appliances and arrangements on OSVs of less than 6,000 GT ITC (500 GRT if GT ITC is not assigned) must comply with part 133 of this subchapter.(b) Lifesaving appliances and arrangements on OSVs of at least 6,000 GT ITC (500 GRT if GT ITC is not assigned) must comply with subparts A, B, and D of part 199 of this chapter.USCG-2012-0208, 79 FR 48934 , Aug. 18, 2014