either at all times or at times, on days or during such periods as may be specified by the  undertaker.  (2) The undertaker must not exercise the powers under paragraph (1) of this article unless it  has—  (3) Any prohibition, restriction or other provision made by the undertaker under article 13  (temporary prohibition or restriction of use of streets and public rights of way) or paragraph (1) of  this article has effect as if duly made by, as the case may be—  and the instrument by which it is effected is deemed to be a traffic order for the purposes of  Schedule 7 to the Traffic Management Act (road traffic contraventions subject to civil  enforcement) 2004( a ).  (4) In this article—  18. —(1) Subject to sub–paragraphs (3) and (4), the undertaker may use any watercourse, public  sewer or drain for the drainage of water in connection with the construction or maintenance of the  authorised development and for that purpose may lay down, take up and alter pipes and may, on  any land within the Order limits, make openings into, and connections with, the watercourse,  public sewer or drain.  (2) Any dispute arising from the making of connections to or the use of a public sewer or drain  by the undertaker pursuant to paragraph (1) is to be determined as if it were a dispute under  section 106 (right to communicate with public sewers) of the Water Industry Act 1991( b ).  (3) The undertaker must not discharge any water into any watercourse, public sewer or drain  except with the consent of the person to whom it belongs, whose consent may be given subject to  such terms and conditions as that person may reasonably impose, but must not be unreasonably  withheld or delayed.  (4) The undertaker must not make any opening into any public sewer or drain except—  ( a ) 2004 c.18. There are amendments to this Act not relevant to this Order.  ( b ) 1991 c.56. Section 106 was amended by sections 43(2) and 35(8)(a) and paragraph 1 of Schedule 2 to the Competition and  Service (Utilities) Act 1992 (c.43) and sections 99(2), (4), (5)(a), (5)(b),(5)(c) and 36(2) of the Water Act 2003 (c.37) and  section 32, Schedule 3, paragraph 16(1) of the Flood and Water Management Act 2010 c.29.  14 (a) permit, prohibit or restrict the stopping, parking, waiting, loading or unloading of vehicles  on any road; and  (b) make provision as to the direction or priority of vehicular traffic on any road,  (a) given not less than 4 weeks’ notice in writing of its intention so to do to the traffic  authority in whose area the road is situated; and  (b) advertised its intention in such manner as the traffic authority may specify in writing  within 7 days of its receipt of notice of the undertaker’s intention in the case of sub- paragraph (a).  (a) the traffic authority in whose area the road is situated as a traffic regulation order under  the 1984 Act; or  (b) the local authority in whose area the road is situated as an order under section 32 (power  of local authorities to provide parking places) of the 1984 Act,  (a) subject to sub-paragraph (b), expressions used in this article and in the 1984 Act have the  same meaning; and  (b) a “road” means a road that is a public highway maintained by and at the expense of the  traffic authority.  Supplementary powers Discharge of water 