Election of office bearers of Officers association

I work in a PSU bank where there are 2 officers association .One is recognised from bank anf other is not.I want to know according to trade union act what is the process of electing office bearers of the association.As the present general secretary who is old retired officers runs the association as one man power driven there is no election by secret ballot etc.He calls a meeting of his favourite people.one of his minions proposes his candidature and other one supports on His instructions.He has no mandate of association members.The workings of the association is totally not in favour of officer members.The selection of zone wise comitee and office bearers os like this only.Please advise as to how do we approach in the matter and weather a retired officer can be general secretary and run the association as he likes.