66.—Where a person is convicted of an offence under section 65 (2)(a) or (b) committed after the commencement of this section, the court shall, unless it is satisfied that there are special and substantial reasons for not so doing, order the person to pay to the Minister the costs and expenses, measured by the court, incurred by the Minister in relation to the investigation, detection and prosecution of the offence, including costs and expenses incurred in the taking of samples and the carrying out of tests, examinations and analyses.