Explanation:

Section 4 in The Trade Unions Act, 1926
Mode of registration.—
(1) ] Any seven or more members of a Trade Union may, by subscribing their names to the rules of the Trade Union and by otherwise complying with the provisions of this Act with respect to registration, apply for registration of the Trade Union under this Act: 2[Provided that no Trade Union of workmen shall be registered unless at least ten per cent. or one hundred of the workmen, whichever is less, engaged or employed in the establishment or industry with which it is connected are the members of such Trade Union on the date of making of application for registration: Provided further that no Trade Union of workmen shall be registered unless it has on the date of making application not less than seven persons as its members, who are workmen engaged or employed in the establishment or industry with which it is connected.] 3[(2) Where an application has been made under sub-section (1) for the registration of a Trade Union, such application shall not be deemed to have become invalid merely by reason of the fact that, at any time after the date of the application, but before the registration of the Trade Union, some of the applicants, but not exceeding half of the total number of persons who made the application, have ceased to be members of the Trade Union or have given notice in writing to the Registrar dissociating themselves from the applications.