In the United States Congress, a joint resolution is a legislative measure that requires approval by the Senate and the House and is presented to the president for his approval or disapproval. Generally, there is no legal difference between a joint resolution and a bill. Both must be passed, in exactly the same form, by both chambers of Congress, and then must — with one exception — be presented to the President and signed by him/her (or, re-passed in override of a presidential veto; or, remain unsigned for ten days while Congress is in session) to become a law. Only joint resolutions may be used to propose amendments to the United States Constitution and these do not require the approval of the President. Laws enacted by virtue of a joint resolution are not distinguished from laws enacted by a bill, except that they are designated as resolutions as opposed to acts (see for example War Powers Resolution).
While either a bill or joint resolution can be used to create a law, they are used differently in current usage. Bills are generally used to add, repeal, or amend laws codified in the United States Code or Statutes at Large, provide policy and program authorizations and twelve annual appropriations bills. Joint resolutions are generally used for, among other things: