Section 2. The said Delaware River Joint Commission shall proceed without delay to study these problems in their entirety in cooperation with the Interstate Commission on the Delaware River Basin, also an agency of the Commonwealth of Pennsylvania, and the State of New Jersey, and of the States of New York and Delaware and shall submit a comprehensive report thereon to the Governor at the earliest practicable date, and in no case later than the first day of February, one thousand nine hundred forty- nine, as well as such interim reports, either upon individual items of the program or the program as a whole, as may be advisable and appropriate.