Any questionnaire issued by the Commission in connection with any investigation under title VII of the Act may be issued as a subpoena and subscribed by a Commissioner, after which it shall have the force and effect of a subpoena authorized by the Commission. Whenever any party or any other person fails to respond adequately to such a subpoena or whenever a party or any other person refuses or is unable to produce information requested in a timely manner and in the form required, or otherwise significantly impedes an investigation, the Commission may:
19 C.F.R. §207.8