(A1) A person shall neither use, nor instigate the use of, a public electronic communications service for the purposes of making calls (whether solicited or unsolicited) for direct marketing purposes except where that person -
(a) does not prevent presentation of the identity of the calling line on the called line; or
(b) presents the identity of a line on which he can be contacted.
(1) A person shall neither use, nor instigate the use of, a public electronic communications service for the purposes of making unsolicited calls for direct marketing purposes where -
(a) the called line is that of a subscriber who has previously notified the caller that such calls should not for the time being be made on that line; or
(b) the number allocated to a subscriber in respect of the called line is one listed in the register kept under regulation 26.
(2) A subscriber shall not permit his line to be used in contravention of paragraphs (A1) or (1).
(3) A person shall not be held to have contravened
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