12.—Where a person is convicted of an offence under this Act in proceedings brought by a local authority, the Agency, or a person specified under section 11 (2), 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 local authority, Agency or other person, as the case may be, the costs and expenses, measured by the court, incurred by the local authority, Agency or other person in relation to the investigation, detection and prosecution of the offence, including costs and expenses incurred in the taking of samples, the carrying out of tests, examinations and analyses and in respect of the remuneration and other expenses of directors, employees, consultants and advisers, as the case may be.