4Paragraph 23 of Schedule 2 to the M1Telecommunications Act 1984 (which provides a procedure for certain cases where works involve the alteration of telecommunication apparatus) shall apply to every relevant undertaker for the purposes of any works carried out by that undertaker in exercise of any of the powers conferred by any enactment (including, in the case of a statutory water company, section 1 of the M2Statutory Water Companies Act 1991).