On appeal from an enforcement order requiring an employee to give up their Fifth Amendment privilege against self-incrimination, how have the corporations appealed from this order?

On appeal from this part of the enforcement order the corporations argue that the court lacked authority: (1) to order the corporations to force a current employee to give up a valid claim of the fifth amendment privilege against self-incrimination, United States v. Hankins, 565 F.2d 1344, 1350 (5th Cir.1978), cert. denied, 440 U.S. 909, 99 S.Ct. 1218, 59 L.Ed.2d 457 (1979); and (2) to force the corporations to appoint a new employee to testify on behalf of the corporations.