(1A) Any dispute arising at any time, whether before or after recognition has been accorded, as to whether any workman or workmen are employed in a managerial, executive, confidential or security capacity may be referred to the Director General by a trade union of workmen or by an employer or by a trade union of employers.
(2) A trade union of workmen may serve on an employer or on a trade union of employers in writing in the prescribed form a claim for recognition in respect of the workmen or any class of workmen employed by such employer or by the members of such trade union of employers.