3. The bulk transport in sea-going vessels of liquid oils or fats which are not to be further processed, and which are intended for or are likely to be used for human consumption, is permitted in tanks that are not exclusively reserved for the transport of foodstuffs, subject to the following conditions —
(a)the tank must be of stainless steel or lined with epoxy resin or technical equivalent; and
(b)the three previous cargoes transported in the tank must have been foodstuffs.