(a) When a question has once been decided in the affirmative or negative, any member voting with the majority may move a reconsideration thereof on the same or the next regular meeting. However, no such resolution shall be introduced at the next or subsequent meeting, unless the same member intending to make it shall have given written notice of this intention at the meeting at which the vote he desires to have reconsidered was taken.

(b) A resolution, once adopted, may be rescinded by subsequent resolution, and ordinances passed may be repealed by subsequent ordinances.