b'(ii)the sign is to be placed by a body which is prescribed for the purposes of this subsection as being a body appearing to the Secretary of State to be representative of the interests of road users or any class of road users. (2)Subsection (1) above does not apply in any case where, before this section comes into force, the payment of a charge has been agreed. Section 154 governs charges for library services (see Chapter 9).107'