Industry guides1 are promulgated by the Commission on its own initiative or pursuant to petition filed with the Secretary or upon informal application therefor, by any interested person or group, when it appears to the Commission that guidance as to the legal requirements applicable to particular practices would be beneficial in the public interest and would serve to bring about more widespread and equitable observance of laws administered by the Commission. In connection with the promulgation of industry guides, the Commission at any time may conduct such investigations, make such studies, and hold such conferences or hearings as it may deem appropriate. All or any part of any such investigation, study, conference, or hearing may be conducted under the provisions of subpart A of part 2 of this chapter.