49 CFR § 804.3 - Definitions.
As used in this part: Meeting means the deliberations of three or more Members where such deliberations determine or result in the joint conduct or disposition of official NTSB business, and includes conference telephone calls otherwise coming within the definition. A meeting does not include:
(a) Notation voting or similar consideration of business, whether by circulation of material to the Members individually in writing or by a polling of the Members individually by telephone.
(b) Deliberations by three or more Members (1) to open or to close a meeting or to release or to withhold information pursuant to § 804.6, (2) to call a meeting on less than seven days' notice as permitted by § 804.7(b), or (3) to change the subject matter or the determination to open or to close a publicly announced meeting under § 804.8(b).
(c) An internal session attended by three or more Members for which the sole purpose is to have the staff brief the Board concerning an accident, incident, or safety problem.
Member means an individual duly appointed and confirmed to the collegial body, known as “the Board,” which heads the NTSB.
National Transportation Safety Board (NTSB) means the agency set up under the Independent Safety Board Act of 1974.