Section 403(2)(a) in West Bengal Municipal Corporation Act, 2006
(a)every Councillor continuing in office as such immediately before the commencement of this Act shall be deemed to be a Councillor under this Act and shall hold office as such Councillor for the unexpired portion of the term of office of the Councillor under any law in force immediately before the coming into force of this Act under which he was elected to be a Councillor or until he vacates, or is removed from, his office, or a new Councillor is elected and assumes office under this Act, whichever is earlier;