law: 4. Amendment of section 2 of Act 82 of 1985.-
  In the Inland Waterways Authority of India Act, 1985, in section 2, for clause (h), the following clause shall be substituted, namely:-
  (h) "national waterway" means the inland waterway declared by section 2 of the National Waterways Act, 2016, to be a national waterway.
  Explanation.-If Parliament declares by law any other waterway to be a national waterway, then, from the date on which such declaration takes effect, such other waterway-
  (i) shall also be deemed to be a national waterway within the meaning of this clause; and
  (ii) the provisions of this Act shall, with necessary modifications (including modification for construing any reference to the commencement of this Act as a reference to the date aforesaid), apply to such national waterway;-