Authorities Cited: United States Code 29 U.S.C. § 621 29 U.S.C. § 623(a)(1) Supreme Court 411 U.S. 792, 802 475 U.S. 574, 586 477 U.S. 317, 322 507 U.S. 604, 610 530 U.S. 133, 141-147 Circuit Courts 695 F.2d 253, 258-259 756 F.2d 524, 551 954 F.2d 424, 427 990 F.2d 928, 931 124 F.3d 887, 892 136 F.3d 1153, 1155 224 F.3d 681, 685 250 F.3d 553, 558 261 F.3d 715, 721 270 F.3d 473, 478 275 F.3d 654, 659 288 F.3d 319, 329 297 F.3d 606, 615-616 302 F.3d 660, 666 323 F.3d 524, 530 327 F.3d 569, 573 349 F.3d 1055, 1064 375 F.3d 552, 561 414 F.3d 686, 692 420 F.3d 712, 727 436 F.3d 816, 823 453 F.3d 900, 903 464 F.3d 691, 695-696 464 F.3d 744, 751 467 F.3d 1049, 1052 476 F.3d 487, 489-490 481 F.3d 556, 559 495 F.3d 779, 783 496 F.3d 820, 826 518 F.3d 479, 483-484 523 F.3d 789, 796 526 F.3d 1054, 1063