Definition of "Workman"
"Workman" means any person (including an apprentice) employed in any industry to do any manual, unskilled, skilled, technical, operational, clerical, or supervisory work for hire or reward, whether the terms of employment are express or implied. For the purposes of any proceeding under this Act in relation to an industrial dispute, it includes any such person who has been dismissed, discharged, or retrenched in connection with, or as a consequence of, that dispute. It also includes any individual whose dismissal, discharge, or retrenchment has led to that dispute. However, it does not include any individual who:
(i) is subject to the Air Force Act, 1950 (45 of 1950), the Army Act, 1950 (46 of 1950), or the Navy Act, 1957 (62 of 1957); or
(ii) is employed in the police service or as an officer or other employee of a prison; or
(iii) is employed mainly in a managerial or administrative capacity; or
(iv) being employed in a supervisory capacity, draws wages exceeding ten thousand rupees per month or exercises functions mainly of a managerial nature, either by the nature of the duties attached to the office or by reason of the powers vested in him.
Therefore, if the Gross Salary of those supervisors is below Ten Thousand rupees, they will be covered under the Workman category, and thus you have to include them under the CLA Act.
Hope this helps you.
Regards