Any five (5) registered voters may commence initiative or referendum proceedings by filing with the City Clerk an affidavit stating they will constitute the petitioners' committee and be responsible for circulating the petition and filing it in the proper form, stating their names and addresses, and specifying the address to which all notices to the committee are to be sent, and setting out in full the proposed initiative ordinance or citing the ordinance sought to be reconsidered.
   Promptly after the affidavit of the petitioners' committee is filed, the Clerk shall issue the appropriate petition blanks to the petitioners' committee.