law: 258. Closing and opening of streets.
  (1) A Board may open any street for public use.
  (2) A Board shall not permanently close any street without the prior permission of the General Officer Commanding in Chief, or the Principal Director:
  Provided that no such street shall be closed for reasons other than the security reasons and without giving a public notice inviting objections and suggestions from the general public.
  (3) The Chief Executive Officer may, by public notice, temporarily close any street or any part of a street for repair or for the purpose of carrying out any work connected with drainage, water-supply or lighting or any other work which he is by or under this Act required or permitted to carry out:
  Provided that where, owing to any works or repairs or from any other cause, the condition of any street or of any water-works, drain, culvert or premise vested in the Board, is such as to be likely to cause danger to the public, the Board shall
  (a) take all reasonable means for the protection of the adjacent buildings and land and provide reasonable means of access thereto;
  (b) cause sufficient barriers or fences to be erected for the security of life and property, and cause such barriers or fences to be sufficiently lighted from sunset to sunrise.