It shall be unlawful for any common carrier to enter into any contract, agreement, or combination with any other common carrier for the pooling of freight of different and competing common carriers, or to divide between them the aggregate or net proceeds of the earnings of such carriers or any portion thereof. In any case of an agreement for the pooling of freights, each day of its continuance shall be deemed a separate offense.
N.D.C.C. § 49-04-10