The Comptroller and Auditor-General shall perform such duties and exercise such powers in relation to the" accounts of the Union and of the States and of any other authority or body as may be prescribed by or under any law made by Parliament and, until provision in mat behalf is so made, shall perform such duties and exercise such powers in relation to the accounts of the Union and of the States as were conferred on or exercisable by the Auditor-General of India immediately before the commencement of this Constitution in relation to the accounts of the Dominion of India and of the Provinces respectively.