The foundation of a firm’s supervisory system is its written supervisory manual, also known as the firm’s policy and procedures manual. All members are required to have a policy and procedures manual that outlines the supervisory structure of the firm and that designates a principal to be responsible for each business area of supervision. The policy and procedures manual must include the title, location, and registration status of all supervisors and a copy of the manual must be kept in each office of the firm where supervised activities are conducted. The purpose of the written policy and procedures manual is to ensure compliance with the firm’s rules, as well as the rules of the industry. The manual must be updated to reflect the adoption of new policies, a change in personnel, or new industry regulations.