Regulation 5 General restriction on marketing and use of casein products
A person must not sell any food with a label, whether or not attached to or printed on the package or container, which includes the name of any casein product unless the requirements set out in paragraph (4) are complied with.
A person must not display any ticket or notice with any food offered or exposed for sale which includes the name of any casein product unless the requirements set out in paragraph (4) are complied with.
A person must not publish, or be a party to the publication of, any advertisement for food which includes the name of a casein product unless the requirements set out in paragraph (4) are complied with.
The requirements are that —
the food is or contains a casein product; or
the name is used in such a context as to indicate explicitly or by clear implication that the food is not a casein product and does not contain one.