(3)Subject to the provisions of any such Order as aforesaid, the Governor-General in Council may, until the date on which Part III of this Act comes into operation, exercise in relation to the Provinces of Sind and Orissa and any Presidency or Province the boundaries of which are altered under this section any powers which he might have exercised if the said new Provinces had been constituted, or those boundaries had been altered, under the provisions in that behalf contained in the Government of India Act.