316 Right to avoid prohibited transaction or to recover excess price. Ch. 30. No. 18.] Services (Charges Control). the provisions set out in the next following section hereto shall have effect as respects the rights of a person for whom that service is performed, or with whom an agreement is made to perform the service, in the course of that business in contravention of subsection (1) of this section. (6) If any person performs, agrees to perform, or offers to perform, any service in contravention of sub- section (1) of this section, he shall be guilty of an offence against this Ordinance: Provided that (a) where it is proved that an offer made in contra- vention of the said) subsection has been followed by an agreement so made in pursuance of that offer, or that an agreement so made has been performed in contravention of the said subsection, those trans- actions together shall be taken to constitute a single offence, and (b) it shall be a defence for a person charged with a contravention of the said subsection to prove that, in relation to the matter in respect of which he is charged, he acted in the course of his employment as a servant or agent of another person on the instructions of his employer or of some other specified person. (7) If any of the provisions of any order made by virtue of subsection (3) of this section are not complied with as respects any busine. the person carrying on the business shall be guilty of an offence under this Ordinance. 4. (1) The following provisions of this section shall have effect where an order is made under the last foregoing section of this Ordinance directing that the maximum charge to be made in the course of a business of any class for the performance of a service of any description in relation to goods of any description shall be computed in such manner, and by reference to such matters as may be provided by the order. (2) Where a prosecution has been instituted in respect of the performance of, or an agreement or offer to perform, any service of a description to which any such direction relates in the course of a business to which any