Regulation 20 Supplementary provisions relating to directory enquiry services

Where a person directs an enquiry relating to a particular subscriber to a directory enquiry service but there is either no entry relating to that subscriber, or no entry relating to his number, in a directory used by that service, nothing in this Part shall be taken to preclude the person in question being told the reason, or possible reason, why there is no such entry, in particular, that, in pursuance of a request made by the subscriber for the purposes of regulation 18(3), regulation 18(3)(a) applies or, in the case of a corporate subscriber, in pursuance of a request made by it for the purposes of regulation 19(2), that provision applies.