(1) The ship must be proceeding en route;
(2) the oily mixture must be processed through oil filtering equipment (meeting the requirements of Annex I regulation 14); (3) the oil content of the effluent without dilution must not exceed 15 parts per million; (4) the oily mixture must not originate from cargo pump room bilges on oil tankers; and (5) the oily mixture, in case of oil tankers, must not be mixed with oil cargo residues. (An alarm and an automatic stopping device are not required to be in operation outside a special area. ) (MARPOL Annex I, reg. 15A)
