(1) Where a veterinarian issues, under section 18(3), a certificate of veterinary approval, that certificate must state—
(a) the full name and address of the person to whom it is issued:
(b) if it is issued to a person in that person's capacity as an employee of the owner of an animal, the full name and address of the owner:
(c) the type of surgical procedure to which the certificate relates and the species of animal on which the person to whom it is issued may perform that surgical procedure:
(d) the duration of the approval given by the certificate.
(2) The veterinarian who issues the certificate may specify that the approval given by the certificate is to have effect—
(a) indefinitely; or
(b) for a stated period; or
(c) until a stated date.
(3) Every certificate issued under section 18(3)—
(a) comes into force on the date specified in the certificate; and
(b) continues in force until—
(i) it is revoked under section 20(1); or
(ii) it is surrendered under section 20(3); or
(iii) in the case of a certificate granted for a stated period or until a stated date, the expiry of that period or the passing of that date.