 In an early case, Landis fined the Allis-Chalmers Manufacturing Company the maximum $4,000 for illegally importing workers, even though Winifred Landis's sister's husband served on the corporate board.In another decision, Landis struck down a challenge to the Interstate Commerce Commission's (ICC) jurisdiction over rebating, a practice banned by the Elkins Act of 1903 in which railroads and favored customers agreed that the customers would pay less than the posted tariff, which by law was to be the same for all shippers.Landis's decision allowed the ICC to take action against railroads which gave rebates.