So far as this Court is concerned, it invoked the doctrine in Indo Afghan Agencies's case 1967 Indlaw SC 411 (supra) in which is was, inter alia, laid down that even though the case would not fall within the terms of Section 115 of the Indian Evidence Act, 1872 (in short the 'Evidence Act') which enacts the rule of estoppel, it would still be open to a party who had acted on a representation made by the Government to claim that the Government should be bound to carry out the promise made by it even though the promise was not recorded in the form of a formal contract as required by Article 299 of the Constitution