Pub. L. 90-351, tit. I, pt. E, sec. 504

Sec. 504. In carrying out its functions, the Administration, or upon authorization of the Administration, any member thereof or any hearing examiner assigned to or employed by the Administration, shall have the power to hold hearings, sign and issue subpenas administer oaths, examine witnesses, and receive evidence at any place in the United States it may designate.