If the Associate Administrator decides that a public meeting on the subject of the petition would contribute to the determination whether to commence a proceeding, he issues a notice of public meeting for publication in the Federal Register to advise interested persons of the time, place, and subject matter of the public meeting and invite their participation. Interested persons may submit their views and evidence through oral or written presentations, or both. There is no cross examination of witnesses. A transcript of the meeting is kept and exhibits may be accepted as part of the transcript. Sections 556 and 557 of title 5, U.S.C., do not apply to meetings held under this part. The Chief Counsel designates a member of his staff to serve as legal officer at the meeting.