The aggregate amount of taxes that may be levied by the taxing authority of this Municipality without a vote of the people, on any taxable property assessed and listed for taxation according to value, for all purposes of the Municipality, shall not in any one year exceed five and one-half mills for each dollar of assessed valuation. Of said total maximum levy, an amount shall annually be levied 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 without the authority of an election, which levy shall be placed before and in preference to all other levies and for the full amount thereof. Of the remaining portion of said total maximum levy, an amount shall annually be levied sufficient to provide the amounts required by law for police and firemen's pensions, and the balance thereof, but not to exceed five mills, may be levied annually for the purpose of paying the current operating expenses of the Municipality.