( 1 ) THIS judgment will dispose of batch of writ petitions which have been listed before us and involve a common question for decision by this Court. Though the petitioners allottees are registered under two different schemes-one of 1979 and the other of 1982 but the challenge is only to the abandoning of the scheme of allotting flats to citizens on hire purchase basis and insisting on cash down payments from the allottees.

( 2 ) THE respondent-Delhi Development Authority, under the regulations framed two schemes. The first scheme is known as Registration scheme on new pattern 1979 of intending purchasers of flats to be constructed by the D. D. A. and the second scheme is for allotment of D. D. A. flats to retired/retiring Govt. servants of 1982. The object of the first scheme as stated in the very first clause is that the Scheme has been formulated to reduce the sale price of M1g/lig and Janata flats so as to be within the reach of common man and to facilitate payments the mode has also been made easier. Clauses 10 and 11 of the said. scheme are :- "clause JO.- While making allotment under the registeration scheme, 40% of the MIG flats will be allotted on cash down ba