5. In these Regulations, unless the context otherwise requires, the following expressions have the meanings hereby respectively assigned to them–
“firsthand sale” means–
in relation to any sea fish or sea fish product which has been first landed in the United Kingdom the first sale thereof (other than a sale by retail) whether prior to or after landing in the United Kingdom;
in relation to any sea fish or sea fish product which has been first landed outside the United Kingdom and any sea fish product manufactured outside the United Kingdom from such sea fish or sea fish product which in either case is purchased by a person carrying on business in the sea fish industry and is imported or brought into the United Kingdom for the purposes of any such business, the first sale thereof (whether in the United Kingdom or elsewhere) to such a person as aforesaid;
in relation to any sea fish or sea fish product which is trans-shipped within British fishery limits, the first sale thereof;
“pelagic fish” means herring, mackerel, pilchard, sprat, scad or whitebait;
“sale by retail” means a sale to a person buying otherwise than for the purpose of resale or processing or use as bait, and includes a sale to a person for the purposes of a catering business (other than a fish frying business); and “sell by retail” has a corresponding meaning;
“week” means a period of seven consecutive days ending at midnight on any Saturday;
“wholesale merchant” means a person selling or offering for sale sea fish or sea fish products otherwise than by retail.