Disputed chargeable interest replaces tax arrear reference; procedural time limit runs from receipt of the authority's order. Amendment substitutes the basis for a specified percentage charge from 'tax arrear' to disputed chargeable interest, effective from 1 September 1998 and deemed substituted, and replaces the reckoning of a thirty day deadline from the passing of a designated authority's order to thirty days from the date of receipt of such order, thereby fixing the commencement of the procedural time limit upon receipt.