Authorities Cited: Code of Federal Regulations 20 C.F.R. § 404.926 20 C.F.R. § 404.950(d)(1) 20 C.F.R. § 404.950(d)(2) 20 C.F.R. § 416.1450 20 C.F.R. § 416.1450(d)(1) 20 C.F.R. § 416.1450(d)(2) Supreme Court 266 U.S. 507, 511 402 U.S. 389, 401-406 424 U.S. 319, 332-335 473 U.S. 305, 320 507 U.S. 619, 630-631 Circuit Courts 590 F.2d 260, 263 633 F.2d 120, 122 879 F.2d 451, 452 895 F.2d 1206, 11-1213 911 F.2d 1075, 1077 913 F.2d 544, 550 93 F.3d 1296, 1300-1307 452 F.3d 734, 736 462 F.3d 876, 886 511 F.3d 798, 804-805