In communes of 1,000 inhabitants or more, when it is necessary to elect a new mayor, the municipal council is deemed to be complete if the only vacancies that exist within it are the consequence of:
<1° Resignations given when the mayor has ceased to hold office and before the election of his successor;
2° A decision of the administrative court that has become final annulling the election of municipal councillors without the concomitant proclamation of other elected members.