A certificate under section 57(4B) of the Act must contain the following particulars—
(a) a statement by the approved expert that he or she is an approved expert within the meaning of section 57 of the Act; and
(b) a statement as to the usual effect of a specified substance or substances on behaviour when consumed or used (including its effect on a person's ability to drive properly); and
(c) the name and signature of the approved expert.