; and (2) in paragraph (3)— (A) by striking On or before January 15 of each year, the Director and inserting The Director ; (B) by striking September 30 each place it appears and inserting December 31 ; and (C) by striking October 1 of that calendar year and inserting January 1 of the next calendar year . 3. Legally binding biennial budget (a) Purposes Section 2(2) of the Congressional Budget and Impoundment Control Act of 1974 ( 2 U.S.C. 621(2) ) is amended to read as follows: (2) to facilitate the determination biennially of the appropriate level of Federal revenues and expenditures by the Congress; . (b) Definitions Section 3 of the Congressional Budget and Impoundment Control Act of 1974 ( 2 U.S.C. 622 ) is amended— (1) by striking paragraph (4) and inserting the following: (4) The term joint resolution on the budget means— (A) a joint resolution setting forth the budget for the United States Government for a biennium as provided in section 301; and (B) any other joint resolution revising the budget for the United States Government for a biennium as described in section 304.