when the presumption of regularity is rebutted, as may occur when the agency
arrives at an identical result on remand under circumstances that throw into
question the regularity of its proceedings, see NRDC, 606 F.2d at 1049 n. 23;
Envtl. Def. Fund, Inc. v. Ruckelshaus, 439 F.2d 584, 598 (D.C.Cir.1971).
[5] Link to KeyCite Notes[6] Link to KeyCite Notes Where the court does not
require additional fact gathering on remand, as in Chamber I, 412 F.3d at 145,
the agency is typically authorized to determine, in its discretion, whether such
fact gathering is needed, see Sierra Club v. EPA, 325 F.3d 374, 382
Serv. Orgs., Inc. v. Bd. of Governors of the Fed. Reserve Sys., 745 F.2d 677,
684-85 (D.C.Cir.1984).
[7] Link to KeyCite Notes[8] Link to KeyCite Notes However, further notice and
comment are not required when additional fact gathering merely supplements
information in the rulemaking record by checking or confirming prior assessments
Portland Cement Ass’n v. Ruckelshaus, 486 F.2d 375, 393 (D.C.Cir.1973). For
example, in Solite, the agency’s explanation of a rule rested on a survey, which
was not part of the rulemaking record, that the agency substituted for an older
report in the rulemaking record. Solite, 952 F.2d at 481. The court stated that
“consistent with the APA, an agency may use ‘supplementary’ data, unavailable
determination.” Community Nutrition, 749 F.2d at 57-58 (citations omitted). When
the agency relies on supplementary evidence without a showing of prejudice by
an interested party, see Solite, 952 F.2d at 484; Community Nutrition, 749 F.2d
at 58, the procedural requirements of the APA are satisfied without further