delivered the opinion of the Court.
■ This action, under § 7 of the Anti-Trust Act, July 2, 1890, c. 647, 26 Stat. 209, was brought by Keogh in the federal District Court for1 Northern Illinois, Eastern Division, in November, 1914. Eight railroad companies and twelve individuals were made defendants. The case was heard upon demurrer to a special plea; the demurrer was overruled; judgment was entered for defendants, plaintiff electing to stand upon his demurrer; and this judgment was affirmed by the Circuit Court of Appeals for the Seventh Circuit.
The cause of action set forth was this: Keogh is a manufacturer of excelsior and flax tow at St. Paul, Minnesota. The defendant corporations are interstate carriers engaged -in transporting freight from St. Paul to points in other States. Prior to September 1, 1912, these carriers formed an association known as the Western *160 Trunk Line Committee. The individual defendants are officers and agents of the carriers .and represent them in that Committee. It is a function of the Committee to secure agreement in respect to freight rates among the constituent railroad companies, which would otherwise be competing carriers. By means of such agreement, competition as to interstate rates from St. Paul on excelsior and tow was eliminated; uniform rates were established; and interstate commerce was restrained. The uniform rates so established were arbitrary and unreasonable; they were higher than those theretofore charged; and they were higher than the rates would have been if competition had not been thus eliminated. Through ■ this agreement for uniform rates Keógh was damaged. The declaration contains a schedule of the amounts paid by him in excess of those which would have been paid under ■rates prevailing before Septeríiber 1, 1912, and which, but for the conspiracy, would have remained in effect. He claims damages to the extent of this difference in rates. He' also alleges as an item of damages that the increase in freight rates'lessened the value of his St. Paul factory through loss of profits.'.
Defendants set up the fact that every rate complained of had been duly filed by the several carriers with the Interstate Commerce Commission; that upon suck filing the rates had been suspended for investigation, upon, complaint of Keogh, pursuant to the Act to Regulate Commerce, February 4, 1887, c. 104, 24 Stat. 379, 384, as amended; that after extensive hearings, in which Keogh participated, the rates were approved by the Commission ; and that they were not made effective until after they had been so approved. The character of the proceedings before the Commission was more fully shown by reference to Keogh v. Chicago, Burlington & Quincy R. R. Co., 24 I. C. C. 606; also Rates on Excelsior and Flax Tow from St. Paul, Minn., 26 I. C. C, 689; Rates *161 on Excelsior and Flax Tow from St. Paul, Minn., 29 I. C. C. 640; Morris, Johnson, Brown, Manufacturing Co. v. Illinois Central R. R. Co., 30 I. C. C. 443; The Excelsior and Flax Tow Cases, 36 I. C. C. 349.
The case is presented on these pleadings. Whether there is a canse of action under § 7 of the Anti-Trust Act is the sole question for decision. Keogh contends, that his rights are not limited to the protection against unreasonably high or discriminatory rates afforded him by the Act to Regulate'Commerce;' that under the AntiTrust-Act he was entitled to the benefit of competitive rates; that the elimination of competition caused the increase in .his rates; and that, as he has been damaged thereby, he is entitled to recover. The instrument by which Keogh is alleged to have been damaged is rates ^approved by the Commission. It is, however, conceivable that, but for' the action of the Western Tftmk Line Committee, one, or,more, of these railroads would have maintained lower rates. ■ Rates .somewhat lower might' also have' been reasonable. Moreover, railroads had often, in the fierce struggle for business, established un-remunerative rates. Since the case arose prior .to the Transportation Act 1920, February 28, c. 91, § 418, 41 Stat. 456, 474, 485, the carriers were at liberty to establish or maintain, even unreasonably low rates provided they were not discriminatory. Compare
Interstate Commerce Commission
v.
Baltimore & Ohio R. R. Co.,
All the- rates fixed were reasonable and • non-discriminatory. That, was settled by the proceedings before the Commission.
Los Angeles Switching Case,
A rate is not necessarily illegal because it is the result of a conspiracy in restraint of trade in violation of the Anti-Trust Act. What rates are legal is determined by the Act to Regulate Commerce. Under § 8 of the latter act the exaction of any illegal rate makes the carrier liable to the “person injured thereby for the full amount of damages sustained in consequence of any such violation” together with a reasonable attorney’s fee. Sections 9 ^nd 16 provide for the recovery of such damages either by complaint before the Commission or by an action in a federal court. If the conspiracy here complained of- had resulted in rates which the Commission found to be illegal because unreasonably high or discriminatory, the full amount of the damages sustained, whatever their nature, would have been recoverable in such proceedings.
Louisville & Nashville R. R. Co.
v.
Ohio Valley Tie Co.,
*163
Section- 7 of the Anti-Trust Act gives a right of action to one who has been “ injured in his business or property.” Injury implies violation of a legal right. The legal rights of shipper as against carrier in respect to a rate are measured by the published tariff. Unless and until suspended or set aside, this rate is made, for all purposes, the legal rate, as between carrier and shipper. The rights, as defined by the tariff cannot be varied or. enlarged by either contract or tort of the carrier.
Texas & Pacific R. R. Co.
v.
Mugg,
The character of the issues involved raises another obstacle to the maintenance of the action. The burden resting upon the plaintiff would not be satisfied by proving that some carrier would, but for the illegal conspiracy,have maintained a rate lower than that published. It would be necessary for the plaintiff to prove, also, that
*164
the hypothetical lower rate would have conformed to the requirements of the Act to Regulate Commerce. For unless the lower rate was one which the carrier could have maintained legally, the changing of it could not conceivably give a cause of action. To be legal a rate must be non-discriminatory. And the proceedings before the Commission in this controversy illustrate how readily claims of unjust discrimination arise. See
Morris, Johnson, Brown, Manufacturing
Co. v.
Illinois Central R. R. Co.,
30 I. C. C. 443. For this reason, it is possible that no lower rate from St. Paul on tow and excelsior could have been legally maintained without reconstituting the whole rate structure for many articles moving in an important section of the country. But it is the Commission which must determine whether a rate is discriminatory; at least, in the first instance. See
Abilene Case, supra; Great Northern Ry. Co.
v.
Merchants Elevator Co.,
Finally, not only does the injury complained of rest oh hypothesis (compare
International Harvester Co.
v.
Kentucky,
Affirmed.
Notes
Compare
Central Coal & Coke Co.
v.
Hartman,
