Section 129.110 - Applicability(a) Electrical installations on OSVs of at least 6,000 GT ITC (500 GRT if GT ITC is not assigned) must comply with subchapter J of this chapter.(b) Except as specifically provided in this subchapter, electrical installations on an OSV of less than 6,000 GT ITC (500 GRT if GT ITC is not assigned) must comply with subchapter J of this chapter.USCG-2012-0208, 79 FR 48936, Aug. 18, 2014