5(1)If the undertakers desire to alter or adjust any apparatus which has not been the subject of a notice under paragraph 6(1)(a) below after the extinguishment of their right to do so, they shall (except in the case of works of repair or renewal required in an emergency) submit to the nominated undertaker plans and specifications of the proposed work and such further particulars as the nominated undertaker may reasonably require.
(2)Any work in respect of which the undertakers are subject to an obligation under sub-paragraph (1) above shall not be constructed except in accordance with such plans as may be approved in writing by the nominated undertaker.
(3)Any approval of the nominated undertaker required under this paragraph—
(a)shall be deemed to have been given if it is neither given nor refused within 28 days of the submission of the plans for approval, and
(b)may be given subject to such requirements as the nominated undertaker may make for the purpose of securing that the work does not interfere with the construction or operation of any work authorised by Part I of this Act or for the protection of any such work.
(4)The requirements which the nominated undertaker may make under sub-paragraph (3) above include requirements as to the construction of protective works and the person by whom the works are to be constructed.
(5)Any work constructed under this paragraph shall be constructed with all reasonable despatch under the superintendence (if given) and to the reasonable satisfaction of the nominated undertaker.