All bond issues to be voted shall be submitted to the electors in the manner provided by the general laws of Ohio. The Council shall annually levy an amount sufficient to pay the interest, sinking fund and retirement charges on all notes and bonds of the Municipality heretofore or hereafter authorized to be issued by the electors. This entire levy shall be outside of the limitations imposed by general law, and shall be placed before and in preference to all other levies and for the full amount thereof. Amounts certified under the laws of Ohio as necessary for such purpose shall not be subject to change by the Council.