The county board shall elect a chair and vice chair of the county board from among the elected members of the county board. The term of the chair and vice chair appointed under this subsection shall be 2 years. The chair of the county board shall be responsible for: Leading public meetings of the county board; Making subcommittee appointments; Serving as the primary contact for communications between the county board and the County Superintendent; Administering the county board in accordance with bylaws adopted under subsection (d) of this section; and Signing contracts authorized and approved by a majority of the members of the county board. Subject to the provisions of § 4–403 of this article, the affirmative vote of the members of the county board for the passage of a motion by the county board shall be: Except as otherwise provided in item (2) of this subsection: Six members when the student member is voting; or Five members when the student member is not voting; or When there are two or more vacancies on the county board: Five members when the student member is voting; or Four members when the student member is not voting. The county board shall adopt bylaws to govern its conduct as necessary and appropriate to carry out its purposes under this title. The county board shall review and update its bylaws at least once every 4 years. At the beginning of each term, each Board member shall attend an orientation and be provided with training materials that clarify the role of a member. In accordance with a schedule determined by the county board in the bylaws adopted under subsection (d) of this section, each elected member shall complete professional development in the following topics during each year of the member’s term: Community engagement; Ethics; Legal issues in education; Parliamentary procedure; Public education budgeting and financing; Role and responsibilities of the county board; and Any other topic determined relevant by the county board. Elected members are encouraged to attend professional conferences relating to their duties and responsibilities as a member of a board of education. On or before December 1 each year, each elected member shall submit a professional development disclosure statement describing the professional development activities the member completed during that year. On or before January 30 each year, the county board shall post the professional development disclosure statements of the members on its website. Each year, the county board shall convene and each elected member shall attend a professional retreat to: Complete professional development or other training; Set annual county board performance goals; and Complete a county board self–evaluation, including identifying opportunities to improve the county board’s performance. Within 30 days of the last day of the professional retreat under paragraph (1) of this subsection, the county board shall post on its website the results of the county board’s self–evaluation and any identified opportunities for improvement.