No ordinance shall be passed at the meeting at which it is introduced. At any regular or special meeting of the Council held not less than six or more than sixty days after the meeting at which an ordinance was introduced, it shall be passed, or passed as amended, or rejected, or its consideration deferred to some specified future date. In case of emergency, the above requirement may be suspended by the affirmative votes of four members of the Council. Every ordinance, unless it be passed as an emergency ordinance, shall become effective at the expiration of twenty calendar days following approval. A brief but fair description for each ordinance shall be published at least twice in a newspaper or newspapers having general circulation in the municipality. An emergency ordinance shall become effective on the date specified in the ordinance.