The population figure to be referred to for the application of the provisions of this code relating to the operation of the municipal council and the provisions of articles L. 2121-2, L. 2121-22, L. 2122-7-1, L. 2122-7-2, L. 2122-9 and L. 2122-10 of this code is that of the authenticated municipal population taken into account at the time of the last full renewal of the municipal council.