Authorities Cited: United States Code 38 U.S.C. § 292(d)(2) 38 U.S.C. § 5110 38 U.S.C. § 7292(c) 38 U.S.C. § 7292(d) 38 U.S.C. § 7292(d)(1) 38 U.S.C. § 7292(d)(2) Code of Federal Regulations 38 C.F.R. § 3.155(a) 38 C.F.R. § 3.310 38 C.F.R. § 3.310(a) 38 C.F.R. § 3.400 38 C.F.R. § 3.400 38 C.F.R. § 4.25 Circuit Courts 13 F.3d 1378, 1384 189 F.3d 1351, 1353 225 F.3d 1293, 1295 357 F.3d 1370, 1373 360 F.3d 1306, 1310 401 F.3d 1296, 1297 497 F.3d 1323 520 F.3d 1330, 1333-1334