Upon receipt of a complaint alleging violation of section 337 of the Tariff Act of 1930, the Commission shall take the following actions:

(a) Examination of complaint. The Commission shall examine the complaint for sufficiency and compliance with the applicable sections of this chapter.

(b) Informal investigatory activity. The Commission shall identify sources of relevant information, assure itself of the availability thereof, and, if deemed necessary, prepare subpoenas therefore, and give attention to other preliminary matters.