45 (c) to authorise any person to enter that conduit to inspect telecommunication apparatus kept installed there; and (d) to enter into agreements on such terms (including terms as to the payments to be made to the authority) as it thinks fit, in connection with the doing of anything authorised by or under this section; and (e) to carry on an ancillary business consisting in the making and carrying out of such agreements. (3) Where any enactment expressly or impliedly imposes any limitation on the use to which a relevant conduit may be put, that limitation shall not have effect so as to prohibit the doing of anything authorised by or under this section. (4) Where the doing by an authority with control of a public sewer of anything authorised by this section would, apart from this subsection, constitute a contravention of any obligation imposed (whether by virtue of any conveyance or agreement or otherwise) on the authority, the doing of that thing shall not constitute such a contravention to the extent that it consists in, or in authorising, the carrying out of works or inspections, or keeping of apparatus, wholly inside a public sewer. (5) Subject to subsections (3) and (4), subsection (2) is without prejudice to the rights of any person with an interest in land on, under or over which a relevant conduit is situated. 65 Notice of construction of railways and electricity works and control of other works (1) Any person who desires to construct or extend any railway or any works for the supply or transmission of electricity shall⎯ (a) give one month’s notice in writing to the Authority of his intention to commence such construction or extension; and (b) furnish the Authority with a plan of the proposed railway or works, together with the particulars showing the manner and position in which the railway or works are intended to be constructed or extended and carried on and such further information as the Authority may require: Provided that this subsection shall not apply to the construction or extension of works or lines for the supply or transmission of electricity of a prescribed voltage. (2) If it appears to the Authority that⎯ (a) the operation of or the equipment to be used in connection with a railway or works referred to in subsection (1) is likely to affect injuriously or interfere with the work or maintenance of a telecommunication line or the carrying on by a telecommunication licensee of a telecommunication service; or (b) any telecommunication line is being affected injuriously or interfered with by the construction or operation of or the equipment used in connection with⎯ (i) a railway or work referred to in subsection (1); or (ii) any railway works or other operations whatsoever;