law: Contact Labour (Regulation and Abolition) Act, 1970
  10. Prohibition of employment of contract labor
  (1) Notwithstanding anything contained in this Act, the
  
  appropriate government may, after consultation with the Central Board or, as
  
  the case may be, a State Board, prohibit, by notification in the Official
  
  Gazette, employment of contract labor in any process, operation or other work
  
  in any establishment.
  (2) Before issuing any notification under sub-section (1) in
  
  relation to an establishment, the appropriate government shall have regard to
  
  the conditions of work and benefits provided for the contract labor in that
  
  establishment and other relevant factors, such as-
  (a) whether the process, operation or other
  
  work is incidental to, or necessary for the industry, trade, business,
  
  manufacture or occupation that is carried on in the establishment;
  (b) whether it is of perennial nature, that is
  
  to say, it is of sufficient duration having regard to the nature of industry,
  
  trade, business, manufacture or occupation carried on in that establishment;
  (c) whether it is done ordinarily through
  
  regular workmen in that establishment or an establishment similar thereto;
  (d) whether it is sufficient to employ
  
  considerable number of whole-time workmen.
  Explanation: If a question arises whether any process or
  
  operation or other work is of perennial nature, the decision of the appropriate
  
  government thereon shall be final.