When several territorial chambers of commerce and industry merge into a single chamber, the president of the new chamber may collect revenue and authorise expenditure under the conditions mentioned in 1° to 4° of article R. 712-18 taking as a reference the aggregate of the initial budgets or latest amending budgets approved by the supervisory authority for the previous year of the chambers that have merged, less a percentage of the amount of revenue and expenditure amounting to 5%, until the presentation of the initial budget for the first financial year of the new chamber to the general meeting that must be held no later than three months after the creation of the new chamber.