Res." designation, and the Senate acts first on vetoed bills that carry an "S." or "S.J. If two-thirds of the Members of the chamber of origin do not agree to override a veto, then the measure dies, and the other chamber does not have an opportunity to vote on the question of repassing the bill. Time for debate on the question is usually controlled and allocated by members of the committee of jurisdiction, and a majority of the House can vote to bring consideration to a close. House Debate on Veto Override

Debate on the question of overriding a veto takes place under the hour rule. or H.J. If the House successfully overrides a veto of a bill that originated in the Senate (S. or S.J. When the Senate receives a vetoed measure from the President or the House, it is quite common for it to be "held at the desk" for several days and considered only after unanimous consent has been reached on the terms of its consideration. If the override vote on a House-originated measure (H.R. Res.)
A bill or joint resolution that has been vetoed by the President can become law if two-thirds of the Members voting in the House and the Senate each agree to pass it over the President's objection. The chambers act sequentially on vetoed measures: The House acts first on House-originated measures (H.R. and H.J. Res.), and the Senate acts first on Senate-originated measures (S. and S.J. Res.). If the first-acting chamber fails to override the veto, the other chamber cannot consider it. The House typically considers the question of overriding a presidential veto under the hour rule, with time customarily controlled and allocated by the chair and ranking member of the committee with jurisdiction over the bill. The Senate usually considers the question of overriding a veto under the terms of a unanimous consent agreement.