Authorities Cited: United States Code 30 U.S.C. § 901(a) Code of Federal Regulations 20 C.F.R. § 310(a) 20 C.F.R. § 725.2(c) 20 C.F.R. § 725.309 20 C.F.R. § 725.309(c) 20 C.F.R. § 725.309(d) 20 C.F.R. § 725.310(a) 20 C.F.R. § 725.409 20 C.F.R. § 725.409(b) 20 C.F.R. § 725.410(c)(1) Circuit Courts 838 F.2d 197, 199-200 843 F.2d 456, 457 876 F.2d 1455, 1459 878 F.2d 151, 152-153 878 F.2d 1083, 1085-1086 978 F.2d 656, 658-659 117 F.3d 1361, 1364-1365