D.C. Circuit Issues Opinion Affecting Oil Pipeline Ratemaking

On July 1, 2016, the United States Court of Appeals for the District of Columbia Circuit ("D.C. Circuit") rendered an opinion affecting the return-on-equity and cost-of-service components of oil pipeline ratemaking. Specifically, the D.C. Circuit ordered FERC to either justify or amend its practice of granting income tax allowances for limited partnership pipelines, questioned FERC's rationale in deciding what financial data should be used to calculate real rate of return on equity, and upheld FERC's determination that a pipeline's cost-of-service rates can already account for changes in costs associated with rate indexes. The D.C. Circuit remanded the case back to FERC on the income tax allowance and real rate of return on equity issues.