Section 40A(1)(b) in The Howrah Municipal Corporation Act, 1980
(b)[he is an elected Councillor not set up by a recognised political party] [Words substituted for the words 'he is an elected Councillor set up by a recognised political party' by W.B. Act 6 of 2001.] and he has joined a recognised political party on the expiry of six months from the date of election :