This section applies to an authority that has two or more member political subdivisions. Except as provided in subsection (g) of this section, the number of directors of the authority is the greater of: Five; or The number of member political subdivisions. Except as provided in subsection (g) of this section, the articles of incorporation for the authority shall provide for: The appointment of directors; The staggering of their terms; and Where the number of member political subdivisions is less than five, the apportioning of the directors between or among the member political subdivisions. The term of a director may not be more than 5 years. If a vacancy occurs during the term of a director, the governing body of the political subdivision that is represented by the director shall fill the vacancy. If a political subdivision joins the authority, the governing body of the joining political subdivision immediately shall appoint one director for a term that is the same as the terms of the other directors. If a political subdivision withdraws from the authority, any director who was appointed to represent the withdrawing political subdivision immediately ceases to be a director. In Harford County: The number of directors of the authority is the greater of: Seven; or The number of member political subdivisions. The articles of incorporation for the authority shall provide for the apportioning of the directors between or among the member subdivisions if the number of political subdivisions is less than seven.