Section 3 Restrictions on importation of substances to which Part I applies.

is proved to the satisfaction of the licensing authority to comply with the standard of strength, quality and purity prescribed in the case of that substance, if the substance is one the manufacture of which is carried on in the United Kingdom, or, if such manufacture is not so carried on, with such standards (if any) of strength, quality and purity, as may be prescribed for that substance, or, if no such standards are so prescribed, with such standards of quality and purity as are prescribed in the case of therapeutic substances of a similar class the manufacture of which is carried on in the United Kingdom, and is consigned to a person licensed by the licensing authority to import it; or

is consigned to a person engaged in scientific research holding a special licence to import it for the purpose of such research issued by the licensing authority.