House Rates Control Act as amended by Gujarat Act 18 of 1965, observed as follows: “The amending clause does not seek to explain any pre-existing legislation which was 8 (1968) 3 SCR 623 Civil Appeal No.________ of 2014 & connected matters Page 39 of 57 (arising out of S.L.P. (C) Nos. 540 of 2009) Page 40 JUDGMENT ambiguous or defective