29.—(1) Nothing in these Regulations shall require a communications provider to do, or refrain from doing, anything (including the processing of data)—
(a)if compliance with the requirement in question—
(i)would be inconsistent with any requirement imposed by or under an enactment or by a court order; or
(ii)would be likely to prejudice the prevention or detection of crime or the apprehension or prosecution of offenders; or
(b)if exemption from the requirement in question—
(i)is required for the purposes of, or in connection with, any legal proceedings (including prospective legal proceedings);
(ii)is necessary for the purposes of obtaining legal advice; or
(iii)is otherwise necessary for the purposes of establishing, exercising or defending legal rights.