I. – In the event of the withdrawal of a commune under the conditions provided for in articles L. 5214-26 and L. 5216-11 of the General Local Authorities Code, the public inter-municipal cooperation body subject to the provisions of Article 1609 nonies C may, by decision of the deliberative body acting by a simple majority of its members under the conditions laid down in article 1639 A, vote a business property tax rate within the limit of the average business property tax rate effectively applied the previous year in the member municipalities, excluding the commune that has withdrawn, weighted by the relative size of the bases taxed on the territory of these communes excluding the commune that has withdrawn.
II. – The provisions of b and c of 1° of III of article 1609 nonies C are applicable. For the application of these provisions, account is taken of the rates actually applied on the territory of the communes when a process of reducing rate differentials was underway.