This rule establishes a delay penalty for the late settlement of tax by an Incorporated Body, set at 1% for each 30-day period or part thereof. It specifies the application of this fine across various scenarios: late payment with a submitted declaration, non-submission of a declaration, and delayed settlement of additional tax post-assessment. The rule clarifies that the Incorporated Body is ultimately liable for the penalty, even if a third party is authorised for payment. Settling tax after an extension period voids the extension, with penalties calculated from original due dates.