defence personnel taking assistance of another office bearer

whether the defence representative can take assistance of another office bearer of the recognised union in departmental enquiry.

Dear V H Kulkarni,
I must confess, being someone who has never dealt with any grievances in the area you seek advice, I would be unable to provide even an pinion.
Given the nature of your query, I have a feeling it might take quite sometime before somebody with the requisite knowledge stumbles upon your query (of course I would like nothing more than being proven wrong in the matter). As such, I suggest you approach somebody with knowledge in the field.
Regards,
Citelegal

He can take assistance from his fellow worker or representative of recognised trade union and even from non recognised union

For the defence representative I mean the chargesheeted employee.He can take the help of a co-worker.If the union representative is also an employee,then he can provide the assistance.

Obviously the Chargesheeted employee can seek guidance from the lawyer and he can ask for assistance from the co-worker whether he is a authorised union representative or not or non union worker. Even the accused can deploy his own counsel for his defence.