whether the terms of employment be expressed or implied, and for the purpose of any proceeding under this Act in relation to an industrial dispute, includes any person who has been dismissed, discharged Or retrenched in connection with, or as a consequence of, that dispute, or whose dismissal, discharge or retrenchment has led to that dispute, but does not include any such person (i) who is subject to the , or the , or the Navy (Discipline) Act, 1934: or (ii) who is employed in the police service or as an officer or other employee of a prison; or (iii) who is employed mainly in a managerial or administrative capacity; or (iv) who, being employed in a supervisor capacity, draws wages exceeding five hundred rupees per mensem or exercises, either by the nature of the duties attached to the office or by reason of the powers vested in him, functions mainly of a managerial nature.