2 U.S.C. § 621. Congressional declaration of purpose

The Congress declares that it is essential—

1. (1)
   (1)to assure effective congressional control over the budgetary process;
2. (2)
   (2)to provide for the congressional determination each year of the appropriate level of Federal revenues and expenditures;
3. (3)
   (3)to provide a system of impoundment control;
4. (4)
   (4)to establish national budget priorities; and
5. (5)
   (5)to provide for the furnishing of information by the executive branch in a manner that will assist the Congress in discharging its duties.