Promoter before accepting advance payment or deposit to enter into agreement and agreement to be registered

Notwithstanding anything contained in any other law a promoter who intends to construct or constructs a block or building of flats, all or some of which are to be taken or are taken on ownership basis, shall, before he accepts any sum of money as advance payment or deposit, which shall not be more than twenty per cent of the sale price, enter into a written agreement for sale with each of such persons who are to take or have taken such flats, and the agreement shall be registered under the Registration Act, 1908 and such agreement shall contain the prescribed particulars; and to such agreement there shall be attached such documents or copies thereof, in respect of such matters, as may be prescribed.