Noxious liquid substance
Noxious liquid substance (NLS) means -
(1) Each substance listed in 33 CFR 151.47 or 33 CFR 151.49;
(2) Each substance having an “A,” “B,” “C,” or “D” beside its name in the column headed “Pollution Category” in Table 1; and
(3) Each substance that is identified as an NLS in a written permission issued under § 153.900(c).