SEC. 4.04. ORDINANCE ADOPTION, AMENDMENT AND REPEAL PROCEDURE.
   Subd. 1. Form and Adoption. The ordaining clause of all ordinances shall be in the words, “The City of Luverne ordains.” Every ordinance shall be introduced in writing. No ordinance shall contain more than one subject which shall be clearly expressed in its title.
   Subd. 2. Signing and Publication. Every ordinance adopted by the Council shall be signed by the Mayor or by two other members, attested by the City Administrator and filed and preserved by him. Every ordinance shall be published once in the official newspaper. However, as to lengthy ordinances, or ordinances which include charts or maps, the Council may, by unanimous vote, determine that publication of the title and a summary of an ordinance would clearly inform the public of the intent and effect of such ordinance, and direct that only the title and summary be published with a notice that a printed copy of the ordinance is available for inspection during regular office hours at the office of the City Administrator and at the City Library. The text of the summary shall be approved by the Council prior to publication. Such publication shall be deemed to fulfill all legal requirements for publication as completely as if the entire ordinance had been published. Proof of publication shall be attached to and filed with the ordinance. To the extent and in the manner provided by law an ordinance may incorporate by reference a statute of Minnesota, a State administrative rule or a regulation, a code, or ordinance or part thereof without publishing the material referred to in full.
   Subd. 3. Emergency. An emergency ordinance is an ordinance necessary for the immediate preservation of the public peace, health, morals, safety or welfare in which the emergency is defined and declared in a preamble thereto. No prosecution shall be based upon the provisions of any emergency ordinance until twenty-four hours after the ordinance has been filed with the City Administrator and posted in three conspicuous places or until the ordinance has been once published in the official newspaper, unless the person charged with violation had actual notice of the passage of the ordinance prior to the act or omission of which complaint is made.
   Subd. 4. When Effective. An emergency ordinance shall take effect immediately upon its adoption or at such later date as is fixed in it. Every other ordinance shall take effect seven days after publication or at such later date as is fixed therein. Every ordinance adopted by the voters of the City shall take effect immediately upon its adoption, or at such later time as is fixed therein.
   Subd. 5. Amendment or Repeal. Every ordinance repealing a previous ordinance or section or subdivision of a codification shall give the number, if any, and the title of the ordinance or section or subdivision to be repealed in whole or in part. No ordinance or section or subdivision shall be amended by reference to the title above, but such an amending ordinance shall set forth in full each section or subdivision so amended.