The municipal council of a commune whose territory was, prior to the entry into force of law no. 83-636 du 13 juillet 1983 modifiée portant modification du statut des agglomérations nouvelles, partially included in the area of competence of a community development syndicate created in application of loi n° 70-610 du 10 juillet 1970, may decide, by a deliberation taken before 1 July 1986, that all residential premises and premises for professional use in the municipality will be valued, from 1 January 1987, by applying the rates in force in the part of the municipal territory located outside the area of jurisdiction of the syndicate.