The enacting clause of all ordinances shall be in the words, “The City of Le Sueur does ordain.” Every ordinance shall be presented in writing and read publicly unless the reading of an ordinance is dispensed with by unanimous consent of those present. No ordinance except an emergency ordinance shall be passed at the meeting at which it is introduced and at least three days shall elapse between its introduction and final passage which shall take place only at a regularly scheduled meeting.