20. This finding, in our view, is not correct in the light of the facts and circumstances of this case because in Ramana Dayaram Shetty's (supra) case there was no concluded contract as in this case. Even conceding that the BDA has the trappings of a State or would be comprehended in 'other authority' for the purpose of Article 12 of the Constitution, while determining price of the houses/flats constructed by it and the rate of monthly installments to be paid, the 'authority' or its agent after entering into the field of ordinary contract acts purely in its executive capacity. Thereafter the relations are no longer governed by the constitutional provisions but by the legally valid contract which determines the rights and obligations of the parties inter-se. In this sphere, they can only claim rights conferred upon them by the contract in the absence of any statutory obligations on the part of the authority (i.e. BDA in this case) in the said contractual field.