S.L. 646.9 Art. 5Onus of proof.

In any proceedings for an offence under these regulations consisting of a failure to comply with a duty or requirement to do something, or to do something so far as is reasonably practicable, it shall be for t]e accused to prove (as the case may be) t]at it was not practicable or not reasonably practicable to do more than was in fact done to satisfy the duty or requirement, or t]at there was no better practicable means than was in fact used to satisfy the duty or requirement.