For paragraph 20 (1) (e) of the Act, an identity card must show—
a if the authorised person is authorised by the administering authority for an infringement notice offence to serve infringement or reminder notices—the unique number given to the person by the administering authority under regulation 11 (Persons authorised for infringement notices etc to have unique number) of the Road Transport (Offences) Regulations 2000 ; and
b the name and signature of the person who issued the card.