39 CFR § 7.4 - Procedure for closing a meeting.
(a) A majority of the entire membership of the Board may vote to close a portion of a meeting or to withhold information concerning a meeting under the provisions of § 7.3 of these bylaws. The members shall take a separate vote with respect to each meeting a portion of which is proposed to be closed to the public, or with respect to any information which is proposed to be withheld, and shall make every reasonable effort to take any such vote at least 8 days before the date of the meeting involved. The members may take a single vote with respect to a series of meetings, portions of which are proposed to be closed to the public, or with respect to information concerning the series, so long as each portion of a meeting in the series involves the same particular matters, and no portion of any meeting is scheduled to be held more than 30 days after the initial portion of the first meeting in the series.
(b) Whenever any person whose interest may be directly affected by a portion of a meeting requests that the Board close that portion to the public for any of the reasons referred to in § 7.3(e), (f), or (g) of these bylaws, upon request of any one of its members the Board shall vote by recorded vote whether to close that portion of the meeting.
(c) The Secretary shall record the vote of each member participating in a vote under paragraph (a) or (b) of this section. Within 1 day of any vote under paragraph (a) or (b) of this section, the Secretary shall make publicly available a written copy of the vote showing the vote of each member on the question. If a portion of a meeting is to be closed to the public, the Secretary shall, within 1 day of the vote, make publicly available a full written explanation of the action closing the portion, together with a list of all persons expected to attend the meeting and their affiliation.