(1) A certificate expressed to be issued under section 43(1) shall, without proof of the signature of the person purporting to sign the certificate or that that person was the proper person so to sign, be sufficient evidence in any legal proceedings of the matters certified in the certificate, until the contrary is shown.
(2) Where a certificate is expressed to have been issued under section 43(3), the following provisions shall, without proof of the signature of the person purporting to sign the certificate or that that person was the proper person so to sign, apply:
(a) where the certificate states that it has been determined that a specimen of blood contained a specified concentration of alcohol or that a specimen of urine contained a concentration of alcohol equivalent to a specified concentration of alcohol in the blood, the certificate shall, in a prosecution for an offence under section 49 or 50 of the Principal Act, but subject to section 45(4) of this Act, be sufficient e