Section 98.30-12 - Stowage of portable tanks and IBCs(a) No person may operate a vessel to which this subpart applies unless each portable tank and/or IBC is stowed on an open deck.(b) No person may stow a portable tank and/or IBC-(1) In the vicinity of another tank that contains a chemically incompatible product; and(2) Unless all electrical equipment is explosion-proof or intrinsically safe, as defined in §§ 111.105-9 and 111.105-11 of this chapter, in the area of the tank and its associated equipment that is-(i) Within 10 feet in any horizontal direction; and(ii) Within 8 feet above the deck.(c) All IBCs must be secured as specified in 49 CFR 176.74 .CGD 73-172, 39 FR 22954, June 25, 1974, as amended by CGD 84-043, 55 FR 37412, Sept. 11, 1990; 55 FR 47477, Nov. 14, 1990. Redesignated and amended by USCG-2011-0088, 78 FR 54785 , 54787, Sept. 6, 2013