due hearing, and a finding by the Commission that the available supply of natural gas is depleted to the extent that the continuance of service is unwarranted, or that the present or future public convenience or necessity permit such abandonment.
We think the petitioners are right.
Pregranted abandonment would leave a producer free to discontinue service to the interstate market, perhaps years after the original certification, with no contemporaneous obligation on the producer to justify withdrawal of service as consistent with the public convenience and necessity. We think Section 7(b) does not contemplate or authorize such procedure.
Attempting to justify its provision for pregranted abandonment the Commission says only, in Order No. 455-A, “Certainly, when an application for pre-granted abandonment is before it for determination as to its certification, the Commission may make the necessary findings required by Section 7(b) of the Act.” We find this conclusory assertion unpersuasive. We have expressed skepticism as to the ability of the Commission to make advance determination of the reasonableness of price escalations, but we have explained that the Commission may be able to do so upon the basis of projections of conditions over the life of a contract, and subject to future proceedings under Sections 4(e) and 5(a) of the Act. It appears to us however that pregranted abandonment requires more clairvoyance than even the Commission’s expertise reasonably encompasses. Furthermore, abandonment will not be subject to future review but will be completely untrammeled.
We are fortified in our conclusion by Sunray Oil Co. v. F. P. C., 364 U.S. 137, 80 S.Ct. 1392, 4 L.Ed.2d 1623 (1960). In that case the Supreme Court rejected the contention that the Commission lacked authority to grant a permanent certificate when one of limited duration had been applied for. The Court said:
If petitioner’s contentions . were to be sustained, the way would be clear for every independent producer of natural gas to seek certification only for the limited period of its initial contract with the transmission company, and thus automatically be free at a future date, untrammeled by Commission regulation, to reassess whether it desired to continue serving the interstate market.
364 U.S. 142, 80 S.Ct. 1396.
The Commission’s proposal for pre-granted abandonment would have the same effect as the proposition contended for in the Sunray ease, with the same potentiality of prejudice to consumers which the Supreme Court pointed out in that case.
We conclude that Section 2.75(e) of the Commission’s Rule is unlawful and must be set aside. In all other respects the Commission’s orders are affirmed. So ordered.
APPENDIX
The Commission, acting pursuant to the provisions of the Natural Gas Act, as amended, particularly Sections 4, 5, 7 and 16 thereof (52 Stat. 822, 823, 824, 825 and 830; 56 Stat. 83, 84; 61 Stat. 459; 76 Stat. 72, 15 U.S.C. 717c, 717d, 717f, and 717o) orders:
(A) Part 2 of the Commission’s General Rules of Practice and Procedure, General Policy and Interpretations, Sub-chapter A, Chapter I, Title 18 of the Code of Federal Regulations is amended by adding new Section 2.75, as follows:
2.75 Optional Procedure for Certificating New Producer Sales of Natural Gas
a. Notwithstanding any other provisions in the General Rules of Practice and Procedure of the Federal Power Commission, or the Regulations Under the Natural Gas Act of the Federal Power Commission, applications for certification of future sales of natural gas produced within the United States may, at the option of