Sec. 6. Initiated repealing ordinances.
   Proposed ordinances for repealing any existing ordinance or ordinances, in whole or in part, may be submitted to the commission as provided in the preceding sections for initiating ordinances. Initiated ordinances adopted by the voters shall be published, and may be amended or repealed by the commission, as in the case of other ordinances, but in no case shall they be repealed until twelve (12) months have expired after the adoption of the ordinance.