Certificate as to damage to be admissible in evidence

If, in any proceedings under this Act, any question arises as to whether a motor vehicle does or does not comply with any provisions of this Act or any regulations, the certificate of any person appointed by the Commissioner of Police with the approval of the Minister by notice in the Gazette to act as an inspector for the purposes of this Act that he has examined the vehicle and as to the result of his examination shall be admissible in evidence and shall be sufficient prima facie evidence of any fact or opinion stated therein relating to the matter in question, and the court shall not licence the officer to be called for cross-examination on the certificate unless contrary evidence is given which appears to the court to be credible, or unless for any reason the court considers cross-examination to be necessary in the interests of justice.