calling of a three-judge court. See Sterling v. Constantin, 287 U. S. 378, 393-394; Railroad Comm’n v. Pacific Cas Co., 302 U. S. 388, 391.
The District Court, acting on motions for summary-judgment filed by each of the parties, said that were the property being transported “strictly governmental property,” the case would be governed by Public Utilities Comm’n of California v. United States, 355 U. S. 534. But since the property involved here is household goods, not military supplies, the court concluded that the case is controlled by Penn Dairies, Inc., v. Milk Control Comm’n, supra.
The distinction drawn by the District Court between this case and Public Utilities Comm’n of California v. United States, supra, is not tenable. Between 1943, when Penn Dairies was decided, and 1958, when Public Utilities Comm’n of California was decided, Congress enacted the Armed Services Procurement Act of 1947, 62 Stat. 21, later codified without substantial change, 70A Stat. 127, 10 U. S. C. § 2301 et seq., wdiich extended and elaborated the federal procurement policy of negotiated rates which, as we noted in the Public Utilities Comm’n of California case, conflicted with California’s policy of regulated rates. 355 U. S., at 544. The federal Regulation involved in that case was superseded in 1958 by the Military Traffic Management Regulation.2 That Regulation includes the “procedures to govern the movement of uncrated household goods.”3 Another Regulation provides that their transportation is authorized “by the mode of transportation . . . which results in the lowest over-all cost to the Government and which provides the required service satisfactorily.”4 This entails “negotiation” with
2
H. R. Rep. No. 670, 81st Cong., 1st Sess. 6.
3
63 Stat. 383, as amended, 40 U. S. C. § 481 (a).
4
The same conclusion must be drawn from the several regulations cited by the Court. When read in full, both the military and civilian transportation regulations seem to anticipate that procurement officers will deal sometimes directly with individual carriers, and some*295times with a regulatory body. The Executive Director, Military Traffic Management Agency, is made responsible for: Similarly, regulations governing nonmilitary transportation make the Transportation and Public Utilities Service responsible for: