I’ll try and give you a comprehensive answer.

Firstly, you need to check the constitution and by-laws of your organisation – they may have specific rules regarding rescission motions. If they do, you need to follow them of course.

If they don’t have specific rules for rescission, then the following applies.

1. If the action that the original motion required has already been taken, then it is pointless for the rescission motion to be moved or contemplated – basically the action is done, no motion will fix it.
2. If the action has been partially taken, then it is best to simply move that no further action be taken.
3. If no action has been taken, then anyone can move the rescission motion. The correct wording is: “That the motion to do XYZ, be rescinded”, or, “That the motion carried at the Marsh 24th meeting requiring XYZ, be rescinded.” or, if you give motions numbers or references, “That motion number F456, moved and carried on March 24th, be rescinded.
4. The motion can be moved and seconded by anyone.
5. If your rules do not state otherwise, it can be carried by a simple majority – 51%