(a) Each tankerman endorsement described in § 13.107 will expressly limit the holder's service under it to transfers involving one or both of the following cargo classifications:

(1) Dangerous liquid (DL).

(2) Liquefied gas (LG).

(b) No tankerman endorsement is necessary to transfer the liquid cargoes in bulk listed in table 2 of part 153 of this chapter when those cargoes are carried on barges not certified for ocean service.