4.—(1) An Agency shall assign or supply forthwith to any person, on request, for the purpose of assigning to a consignment of special waste or, where the consignment is one in a carrier’s round, to the consignments in that round, a code unique to that consignment or round, as the case may be.
(2) A code assigned or supplied in accordance with paragraph (1) may consist of letters, numbers or symbols, or any combination of letters, numbers and symbols, or a bar code which enables the consignment or carrier’s round, as the case may be, to be identified electronically.