16 CFR § 4.14 - Conduct of business.
(a) Matters before the Commission for consideration may be resolved either at a meeting under § 4.15 or by written circulation. Any Commissioner may direct that a matter presented for consideration be placed on the agenda of a Commission meeting.
(b) A majority of the members of the Commission in office and not recused from participating in a matter (by virtue of 18 U.S.C. 208 or otherwise) constitutes a quorum for the transaction of business in that matter.
(c) Any Commission action, either at a meeting or by written circulation, may be taken only with the affirmative concurrence of a majority of the participating Commissioners, except where a greater majority is required by statute or rule or where the action is taken pursuant to a valid delegation of authority. No Commissioner may delegate the authority to determine his or her vote in any matter requiring Commission action, but authority to report a Commissioner's vote on a particular matter resolved either by written circulation, or at a meeting held in the Commissioner's absence, may be vested in a member of the Commissioner's staff.