9. Claim for recognition.
(1) No trade union of workmen the majority of whose membership consists of workmen who are not employed in any of the following capacities that is to say -
• (a) managerial capacity;
• (b) executive capacity;
• (c) confidential capacity; or
• (d) security capacity,
may seek recognition or serve an invitation under section 13 in respect of workmen employed in any of the abovementioned capacities.