law: Building and Other Construction Workers (Regulation of Employment and Conditions of Service) Act, 1996 
  
  28 .Fixing hours for normal working day, etc.- 
  (1) The appropriate Government may, by
  
  rules,----
  (a) fix the number of hours of work which shall constitute a normal working day
  
  for a building worker, inclusive of one or more specified intervals;
  (b) provided for a day of rest in every period of seven days which shall be
  
  allowed to all building workers and for the payment of remuneration in respect
  
  of such days of rest;
  (c) provide for payment of work on a day of rest at a rate not less than the
  
  overtime rate specified in section 29.
  (2) The provisions of sub-section (1) shall,
  
  in relation to the following classes of building workers, apply only to such
  
  extent, an subject to such conditions, as may be prescribed, namely:---
  (a) persons engaged on urgent work, or in any emergency which could not have
  
  been foreseen or prevented;
  (b) persons engaged in a work in the nature of preparatory or complementary
  
  work which must necessarily be carried out outside the normal hours of work
  
  laid down in the rules:
  (c) persons engaged in any work which for technical reasons has to be completed
  
  before the day is over;
  (d) persons engaged in a work which could not be carried on except at times
  
  dependant on the irregular action of natural forces.