PART 1600—ORGANIZATION AND FUNCTIONS OF THE CHEMICAL SAFETY AND HAZARD INVESTIGATION BOARD Authority: 5 U.S.C. 301, 552(a)(1); 42 U.S.C. 7412(r)(6)(N). Source: 68 FR 65403, Nov. 20, 2003, unless otherwise noted. § 1600.1 Purpose. This part describes the organization, functions, and operation of the Chemical Safety and Hazard Investigation Board (CSB). The CSB is an independent nonregulatory agency of the United States created by the Clean Air Act Amendments of 1990 [Pub. L. 101-549, 104 Stat. 2399, codified at 42 U.S.C. 7412(r)(6) et seq. http://www.csb.gov. [90 FR 54243, Nov. 26, 2025] § 1600.2 Organization. (a) The CSB's Board consists of five Members appointed by the President with the advice and consent of the Senate. The President designates one of the Members as Chairperson with the advice and consent of the Senate. The Members exercise various functions, powers, and duties set forth in the Clean Air Act Amendments of 1990 (42 U.S.C. 7412(r)(6) et seq. (b) The CSB's staff is comprised of the Office of Administration, the Office of Investigations and Recommendations, the Office of General Counsel and such other administrative units as established by the CSB Board. [68 FR 65403, Nov. 20, 2003, as amended at 88 FR 36256, June 2, 2023; 90 FR 54243, Nov. 26, 2025] § 1600.3 Functions. (a) The CSB investigates chemical accidents and hazards, recommending actions to protect workers, the public, and the environment. The CSB is responsible for the investigation and determination of the facts, conditions, and circumstances and the cause or probable cause or causes of any accidental release resulting in a fatality, serious injury, or substantial property damages. (b) The CSB makes safety recommendations to Federal, State, and local agencies, including the Environmental Protection Agency and the Occupational Safety and Health Administration, and private organizations to reduce the likelihood of recurrences of chemical incidents. The CSB initiates and conducts safety studies and special investigations on matters pertaining to chemical safety. (c) The CSB issues reports pursuant to its duties to determine the cause or probable cause or causes of chemical incidents and to report the facts, conditions, and circumstances relating to such incidents; and issues and makes available to the public, safety recommendations, safety studies, reports of special investigations, safety videos, and other safety products. [68 FR 65403, Nov. 20, 2003, as amended at 90 FR 54243, Nov. 26, 2025] § 1600.4 Operation. In exercising its functions, duties, and responsibilities, the CSB utilizes the CSB's staff, consisting of specialized offices performing investigative, administrative, legal, and other work for the Board. [90 FR 54243, Nov. 26, 2025] § 1600.5 Quorum and voting requirements. (a) Quorum requirements. (1) A tie vote results in no action. If the Board consists of only a single Member (whether the Chairperson or another Member), that single Member may not transact Board business or take any action that requires approval by the Board, except as provided in Board Orders adopted by the Board. Regulations, rules, and Board Orders of the CSB may be approved, amended, rescinded, or revoked only by a majority vote of the Board. In the event that the Board consists of only a single Member (whether the Chairperson or another Member), that single Member may not approve, amend, rescind, or revoke any regulation, rule, or Board Order of the CSB. (2) [Reserved] (b) Voting. Board member shall be recorded by the General Counsel who shall retain it in the records of the Board. If a Board member votes to calendar a notation item in accordance with applicable Board Orders, the Board must consider the calendared notation item at a public meeting of the Board within 60 days of the date on which the item is calendared. This section does not permit a notation item to be calendared other than as provided in applicable Board Orders. A notation vote to schedule a public meeting or a special meeting may not be calendared. The Chairperson shall add any calendared notation item to the agenda for the next CSB public meeting if one is to occur within 60 days or schedule a special meeting to consider any calendared notation item no later than 60 days from the calendar action. Any disagreement about whether a notation item has been calendared effectively in accordance with applicable Board Orders shall be decided by the Board. (c) Public meetings and agendas. (1) Agenda. (2) Publication of agenda information. [90 FR 54243, Nov. 26, 2025]