Industrial Disputes (Central) Rules, 1957
39. Number of members
The number of members constituting the committee shall be fixed so as to afford representation to the various categories, groups and classes of workmen engaged in, and to the section, shops or departments of the establishment :
PROVIDED that the total number of members shall not exceed twenty:
PROVIDED FURTHER that the number of representatives of the workmen shall not be less than the number of representatives of the employer.