46 CFR §151.01-15

1. (a)Any liquid or liquefied gas, which meets the definitions referred to in § 151.01-1 and is not named in Table 151.05 or Table 30.25-1 of this chapter shall not be transported in bulk in a manned or unmanned tank barge without the prior specific approval of the Commandant.
2. (b)Mixtures or blends of two or more cargoes, one or more of which appears in Table 151.05, will be treated as though they were new products and specific approval of the Commandant must be obtained prior to undertaking their transportation.