- (a) Causes of action. Two (2) or more grounds of complaint concerning the same principal, subject, or state of facts may be included in one (1) complaint but should be stated separately and numbered.
- (b) Plaintiffs. Two (2) or more plaintiffs may join in one (1) complaint if their respective causes of action are against the same defendant or defendants and concern substantially the same alleged violation of the act and a like state of facts.
(c) Defendants.
- (1) If complaint is made with respect to through transportation by continuous carriage or shipment, all persons subject to the act participating therein and against whom an order is sought should be made defendants.
- (2) If complaint is made of a classification or any provision thereof, ordinarily it will suffice to make defendants the persons operating one (1) or more through routes between representative points of origin and destination.