49 CFR 1012.4 - Public participation.
(a) In the case of Board or Division conferences or meetings of committees of the public, members of the public will be admitted as observers only. Active participation, as by asking questions or attempting to participate in the discussion, will not be permitted, and anyone violating this proscription may be required to leave the meeting by the presiding officer.
(b) Oral arguments are always open to the public. The scheduling of participants in the arguments and the allotment of time is governed by 49 CFR part 1116.