Section 4(5)(b) in The Central Administrative Tribunal (Procedure) Rules, 1987
(b)Such permission may also be granted to an association representing the persons desirous of joining in a single application provided, however, that the application shall disclose the class/grade/categories or persons on whose behalf it has been filed [provided that at least one affected person joins such an application.] [Added by G.S,R. 1000(E), dated 11.10.1988 (w.e.f. 24.10.1988). ]