It may be pointed out that under the Madras Buildings (Lease and Rent Control) Act, 1946 and the Madras Buildings (Lease and Rent Control) Act, 1949, which preceded the Tamil Nadu Act 18 of 1960, the scheme of fixation of fair rent was different, in that the fair rent was related "to the prevailing rate of rent in the locality for the same or similar accommodation in similar circumstances during the twelve months period to 1st April, 1940" and only a fixed percentage of increase varying from 8 1/3 % to 50 % was allowed on such rate of rent, depending upon whether it exceeded or did not exceed a certain limit ' But the Legislature while enacting the Tamil Nadu Act 18 of 1960 made a departure from that scheme presumably because it felt that in view of the staggering and disproportionately heavy fall in, the purchasing power of the rupee over the last 30 years, it was most, unrealistic to peg the fair rent to the level of rents prevailing during the period of 12 months prior to 1st April, 1940 and allow only an ad hoc percentage of increase, and therefore, in section 4, sub sections