Section 98.33-5 - Portable tanks and IBCs authorized(a) The cargoes authorized under § 98.33-3 may be transferred to and from portable tanks to which this subpart applies if the portable tanks have:(1) A minimum design pressure of 9 psig.(2) Pressure-relief devices that may be frangible pressure-relief devices (rupture disks), and that do not open at less than 3 psig.(b) The cargoes authorized under § 98.33-3 may be transferred to and from IBCs to which this subpart applies if the IBCs meet the requirements in § 98.30-6 .CGD 84-043, 55 FR 37412, Sept. 11, 1990; 55 FR 47477, Nov. 14, 1990; USCG-2011-0088, 78 FR 54788 , Sept. 6, 2013