109.— (1) Subject to subsection (2), every certificate which is required for any purpose by or under any enactment or any statutory instrument to be signed by any physician, surgeon, licentiate in medicine and surgery or other medical practitioner shall, F208[on and after the repeal of section 59 of the Act of 1978], be signed by a registered medical practitioner and no such certificate signed F208[on or after that repeal] by a person who is not a registered medical practitioner shall be of any validity or effect.

(2) Subsection (1) shall not operate to prevent a person who is not a registered medical practitioner from signing a certificate if any enactment or any statutory instrument requires or permits the person to sign the certificate in a capacity other than the capacity of physician, surgeon, licentiate in medicine and surgery or other medical practitioner and that person is of that other capacity.

(3) In this section, “certificate” includes a prescription.