§ 504.
(b)
Findings of fact by Secretary of Labor; new or modified findings
The findings of fact by the Secretary of Labor, if supported by substantial evidence, shall be conclusive; but the court, for good cause shown, may remand the case to the Secretary of Labor to take further evidence and the Secretary of Labor may thereupon make new or modified findings of fact and may modify his previous action, and shall certify to the court the record of the further proceedings. Such new or modified findings of fact shall likewise be conclusive if supported by substantial evidence.
([Aug. 14, 1935, ch. 531], title III, § 304, as added [Pub. L. 91–373, title I, § 131(a)], Aug. 10, 1970, [84 Stat. 703]; amended [Pub. L. 96–249, title I, § 127(b)(2)], May 26, 1980, [94 Stat. 367]; [Pub. L. 96–265, title IV, § 408(b)(2)], June 9, 1980, [94 Stat. 469]; [Pub. L. 96–473, § 6(e)(2)], Oct. 19, 1980, [94 Stat. 2265]; [Pub. L. 98–620, title IV, § 402(39)], Nov. 8, 1984, [98 Stat. 3360]; [Pub. L. 100–485, title I, § 124(b)(2)], Oct. 13, 1988, [102 Stat. 2353]; [Pub. L. 100–628, title IX, § 904(c)(1)(B)], Nov. 7, 1988, [102 Stat. 3261]; [Pub. L. 103–152, § 4(a)(2)], Nov. 24, 1993, [107 Stat. 1517].)