50(1)Subject to this section, a certificate of an analyst stating that the analyst has analyzed or examined a sample submitted to the analyst by a medical officer of health or an inspector and stating the result of the analysis or examination is admissible in evidence in a prosecution with respect to an offence under this Act or the regulations and, in the absence of evidence to the contrary, is proof of the statements contained in the certificate without proof of the appointment, authority or signature of the person purporting to have signed the certificate.