When these cases were here the first time, we sustained the authority of the Federal Power Commission to determine the tax component of United’s cost of service in
*72
accordance with the formula developed by it in
Cities Service Gas Co.,
30 F. P. C. 158 (1963), but remanded the cases with respect to whether in applying the
Cities Service
formula it was significant that United aрparently had both jurisdictional and non jurisdictional activities and income.
FPC
v.
United Gas Pipe Line Co.,
The petitions for certiorari are granted and the judgment of the Court of Appeals is reversed.
†
Although we acquiesce in the Court of Appeals’ construction of Unitеd’s petition for rehearing filed with the Commission, the issue on remand was not in the proper posture for final determination by the Court of Appeals and should have been remanded to the Commission for furthеr consideration. It is true that the Commission in its opinion had remarked that “United is largely a regulated company, and we shall designate it as such for the purpose of these computations.”
United Gas Pipe Line Co.,
31 F. P. C. 1180, 1190 (1964). But the Commission made no effort to justify this characterization of United in terms of thе findings, the fundamentals of the
Cities Service
formula, or the applicable law. This may have been because the adversary proceedings wеre primarily concerned with the validity of the formula itself and nevеr focused precisely on the question of intra-company rеvenue and cost allocation. Whatever the reason, thеre was “no indication of the basis on which the Commission exercisеd its expert
*73
discretion/’ no articulation of “any rational cоnnection between the facts found and the choice made.”
Burlington Truck Lines, Inc.
v.
United States,
But it does not follow that the Court of Appeals, in thе face of the Commission’s insistence that its decision was wholly cоnsistent with its
Cities Service
formula, should have itself determined that consolidated return sаvings be first allocated to non jurisdictional income and that “incоme from the unregulated component of United is sufficiently large to absorb all such net tax losses and no excess remains to reduсe the regulated taxable income of United.”
United Gas Pipe Line Co.
v.
FPC,
It is so ordered.
Notes
The motion for leave to use the record in the prior proceedings before this Court, Nos. 127 and 128, October Term, 1966, is granted.
