Section 98.33-1 - Applicability(a) This subpart contains regulations concerning transfer of certain low-hazard materials to and from portable tanks on vessels(b) This subpart applies to the following portable tanks:(1) A DOT-specification 57 portable tank constructed on or before October 1, 1996, or a UN portable tank (see 49 CFR 173.32 and § 98.30-3 ).(2) A portable tank authorized under 49 CFR 176.340(b) .(3) A portable tank approved by the Commandant under subpart 50.20 of this chapter.(4) An Intermediate Bulk Container (IBC), but restricted to those metal IBCs as described in § 98.30-6 .CGD 84-043, 55 FR 37412, Sept. 11, 1990; 56 FR 13598, Apr. 3, 1991, as amended by CGD 97-057, 62 FR 51046, Sept. 30, 1997; USCG-2012-0832, 77 FR 59780 , Oct. 1, 2012; USCG-2011-0088, 78 FR 54787 , Sept. 6, 2013