(a) Number of copies and where filed. All petitions pursuant to section 516 Tariff Act of 1930, as amended (19 U.S.C. 1516), shall be submitted to the Commissioner of Customs in triplicate.

(b) By whom filed. Petitions may be filed by the domestic interested parties themselves, or by duly authorized attorneys or agents on their behalf. A petition filed by a corporation shall be signed by an officer thereof, and petition filed by a partnership shall be signed by a member thereof.

The petition shall be itemized as to each class or kind of merchandise involved, and shall contain the following:

(a) The name of the petitioner, his principal place of business, and the fact that he is a domestic interested party;

(b) A statement showing the class or kind of merchandise manufactured, produced, or sold by him which is claimed to be similar to the imported merchandise in such detail as will permit the Commissioner of Customs to establish the similarity between the domestic and foreign merchandise; and

(c) A presentation, in detail, of the information required by section 516, Tariff Act of 1930, as amended (19 U.S.C. 1516).