(18A)Certificate by particular person is evidence of matters relating to the person#

If by any provision of this section a certificate of or purporting to be signed by a health care professional, an authorised police officer or an analyst is made evidence of any matter, a certificate purporting to be signed by a health care professional, an authorised police officer or an analyst, as the case may be, as to that matter must, on its production in any proceeding, be accepted as evidence—

1. (a)that the signature on the certificate is that of the person by whom the certificate purports to be made; and
2. (b)of all matters contained therein including the status, authority or qualification of the person by whom the certificate purports to be made;

and until the contrary is proved is conclusive such evidence.