You must follow this subpart if your vessel carries group I-IV oils, and is required by Sec. 155.1015 or Sec. 155.5015 to have a vessel response plan. [USCG-1998-3417, 73 FR 80649, Dec. 31, 2008, as amended by USCG-2008-1070, 78 FR 60123, Sept. 30, 2013]