(820 ILCS 35/5b) (from Ch. 10, par. 25)
    Sec. 5b. Whenever two or more employers engaged in the same general line of business, employing in the aggregate not less than twenty-five persons, and having a common difference with their employes, shall, co-operating together, make application for arbitration, or whenever such application shall be made by the employes of two or more employers engaged in the same general line of business, such employes being not less than twenty-five in number, and having a common difference with their employers, or whenever the application shall be made jointly by the employers and employes in such case, the Department of Labor shall have the same powers and proceed in the same manner as if the application had been made by one employer, or by the employes of one employer, or by both.
(Source: Laws 1943, vol. 1, p. 207.)