law: Minimum Wages Act, 1948
  4. Minimum rate of wages 
  (1) Any minimum rate of wages fixed or
  
  revised by the appropriate government in respect of scheduled employments under
  
  section 3 may consist of –
  
  
  (i) a basic rate of
  
  wages and a special allowance at a rate to be adjusted at such intervals and in
  
  such manner as the appropriate government may direct to accord as nearly as
  
  practicable with the variation in the cost of living index number applicable to
  
  such workers (hereinafter referred to as the "cost of living
  
  allowance"); or
  (ii) a basic rate of
  
  wages with or without the cost of living allowance and the cash value of the
  
  concessions in respect of suppliers of essential commodities at concession
  
  rates where so authorized; or
  (iii) an all-inclusive
  
  rate allowing for the basic rate the cost of living allowance and the cash
  
  value of the concessions if any.
  (2) The cost of living allowance and the cash
  
  value of the concessions in respect of supplied of essential commodities at
  
  concession rate shall be computed by the competent authority at such intervals
  
  and in accordance with such directions as may be specified or given by the
  
  appropriate government.