upon, consequential further steps are taken in accordance with law, and third party interests are created, then rescinding or revoking such an order, at that stage, would have serious consequences. Then in those circumstances it cannot be said that the power to issue notification includes the power to rescind or revoke. In the absence of a specific provision providing for such recession or revocation and an express or implied bar for such recession or revocation, Section 21 of the General Clauses Act applies, and such a power is to be read into such enactment. Otherwise, the very object of enacting this piece of Legislation becomes redundant. Ultimately the applicability of Section 21 of the Act depends on the scheme of the Act, the nature of power conferred, the object sought to be achieved and the language employed in the said provision. Broadly stated, Section 21 of the Act, applies as a rule, non application is an exception. To exclude the application of the general rule, there must be an exceptional circumstance. Section 21 is based on the principle that power to create includes the power to destroy and also the power to alter what is created. The power to rescind a notification is