law: Railways Act, 1989
  136. Power to make rules in respect of matters in this
  
  Chapter. 
  (1) The Central Government may, by notification, make rules to
  
  carry out the purposes of this Chapter.
  (2) In particular, and without prejudice to the generality of
  
  the foregoing power, such rules may provide for all or any of the following
  
  matters, namely :- 
  (a) the authorities who may declare the
  
  employment of any railway servant essentially intermittent or intensive ;
  (b) the appeals against any such declaration
  
  and the manner in which, and the conditions subject to which any such appeal
  
  may be filed and heard ;
  (c) the categories of staff that may be
  
  specified under sub-clauses (iv) and (v) of clause (c) of section 130 ;
  (d) the authorities by whom exemptions under
  
  sub-section (4) of section 132 or sub-section (3) of section 133 may be made;
  (e) the delegation of power by the authorities
  
  referred to in clause (d);
  (f) the railway servants to whom clause (ii)
  
  of sub-section (2) of section 133 apply and the periods of rest to be granted
  
  to them;
  (g) the appointment of supervisors of railway
  
  labor and their functions.