Opinion ID: 1211741
Heading Depth: 2
Heading Rank: 2

Heading: standard of review

Text: We review de novo legal questions raised by the TSA's order. See S. Cal. Aerial Advertisers' Ass'n v. FAA, 881 F.2d 672, 677 (9th Cir.1989). We review the TSA's findings for substantial evidence. See 49 U.S.C. § 46110(c). We may set aside the order if it is unconstitutional, contrary to law, arbitrary and capricious, ultra vires, or unsupported by substantial evidence, see 5 U.S.C. § 706(2)(A)-(E), but we must also accord deference to an agency's interpretation of its own regulations, see Alhambra Hosp. v. Thompson, 259 F.3d 1071, 1074 (9th Cir.2001). We may affirm, amend, modify, or set aside any part of the order and may order the Secretary . . . to conduct further proceedings. 49 U.S.C. § 46110(c).