Bombay Industrial Relations Act (extended to Gujarat), 1946
The Registrar shall cancel the registration of union— (a) if the Industrial Court directs that the registration of such union shall be cancelled ; (b) if, [after giving notice to such union to show cause why its registration should not be cancelled and] after holding such inquiry, if any, as he deems fit, he is satisfied— (i) that it was registered under mistake, misrepresentation or fraud ; or (ii) that the membership of the union has for a continuous period of three [calendar months] fallen below the minimum required under section 13 for its registration : Provided that, where a strike or a closure not being an illegal strike or closure under his Act in an industry involving more than a third of the employees in the industry in the area has extended to a period exceeding fourteen days in any calendar month, such month shall be excluded in computing the said period of three months :