(a) Filing of the petition. Any interested party who files a petition with the administering authority pursuant to section 702(b) or section 732(b) of the Act in a case in which a Commission determination under title VII of the Act is required, shall file copies of the petition and all exhibits, appendices, and attachments thereto, pursuant to § 201.8 of this chapter, with the Secretary on the same day the petition is filed with the administering authority. A paper original and eight (8) true paper copies of a petition shall be filed. One copy of all exhibits, appendices, and attachments to the petition shall be filed in electronic form on CD-ROM, DVD, or other portable electronic format approved by the Secretary. Petitioners also must file one unbound copy of the petition (the unbound copy of the petition may be stapled or held together by means of a clip). If the petition complies with the provisions of § 207.11, it shall be deemed to be properly filed on the date on which the requisite number of copies of the petition is received by the Secretary, provided that, if the petition is filed with the Secretary after 12:00 noon, eastern time, the petition shall be deemed filed on the next business day. Notwithstanding § 207.11 of this chapter, a petitioner need not file an entry of appearance in the investigation instituted upon the filing of its petition, which shall be deemed an entry of appearance.

(b) Service of the petition. (1)(i) The Secretary shall promptly notify a petitioner when, before the establishment of a service list under § 207.7(a)(4), he or she approves an application under § 207.7(a). When practicable, this notification shall be made by facsimile transmission. A copy of the petition including all business proprietary information shall then be served by petitioner on those approved applicants in accord with § 207.3(b) within two (2) calendar days of the time notification is made by the Secretary.

(ii) The petitioner shall serve persons enumerated on the list established by the Secretary pursuant to § 207.7(a)(4) that have not been served pursuant to paragraph (b)(1)(i) of this section within two (2) calendar days of the establishment of the Secretary's list.

(2) A copy of the petition omitting business proprietary information shall be served by petitioner on those persons enumerated on the list established by the Secretary pursuant to § 201.11(d) of this chapter within two (2) calendar days of the establishment of the Secretary's list.

(3) Service of the petition shall be attested by filing a certificate of service with the Commission.

(c) Amendments and withdrawals; critical circumstances. (1) Any amendment or withdrawal of a petition shall be filed on the same day with both the Secretary and the administering authority, without regard to whether the requester seeks action only by one agency.

(2) When not made in the petition, any allegations of critical circumstances under section 703 or section 733 of the Act shall be made in an amendment to the petition and shall be filed as early as possible. Critical circumstances allegations, whether made in the petition or in an amendment thereto, shall contain information reasonably available to petitioner concerning the factors enumerated in sections 705(b)(4)(A) and 735(b)(4)(A) of the Act.