1. Votes on legislation shall last for a maximum of 3 days (i.e. 72 hours).
2. When a piece of legislation has enough votes to pass or fail, the office in control of the legislative slot shall announce that he or she will close the vote in 24 hours and that any Senator who wishes to change his or her vote must do so during that interval.
3. If a piece of legislation is vetoed by the president, the bill's sponsor may request an override of the veto within 3 days, i.e. 72 hours, of the veto taking place. The Speaker may extend this period if the bill's sponsor is on a publicly-declared leave of absence.
4. For the purposes of overriding vetoes, any Senator who abstains from voting shall be counted as a vote against overriding the veto.
Given a vote can only last 72 hours, and JCL's switching was after 72 hours had passed, the amendment has still passed.