SECTION 15.11   PUBLICATION, ALTERATION OR REPEAL OF CERTAIN ORDINANCES.
   An initiated and referred ordinance adopted or approved by the qualified electors shall be published, and such ordinance shall not be altered or repealed within six months from its effective date by the Council nor thereafter except by vote of three-fourths of all members of the Council.  The Council may submit the question of the amendment or repeal of such ordinance to the voters as provided in Section 15.8 of this Charter.