This section applies to each tank barge that carries, in independent tanks described in Sec. 151.15-1(b) of this chapter, a cargo listed in Table 30.25-1 of this chapter that is a--
(a) Liquefied flammable gas; or
(b) Flammable liquid that has a Reid vapor pressure in excess of 25 pounds per square inch (172.4 KPa).