Anadarko Petroleum Corporation,petitioners v. Federal Energy Regulatory Commission, Amoco Production Company, Intervenors

Opinion for the Court filed PER CURIAM.

Subsequent to our decision of October 29, 1999, the Commission petitioned for rehearing seeking clarification on the issue of the effective date for refunds discussed in Part V of our opinion. See Anadarko Petroleum Corp. v. FERC, 196 F.3d 1264, 1269-70 (D.C.Cir.1999). Information presented to the Commission in other proceedings indicated that two of the factual assumptions upon which our opinion was premised were incorrect. First, contrary to this panel’s understanding, see id. at 1270, the tax assessment sent to the producers by the State of Kansas…