(a) Unless the structure of the board of directors is otherwise specified in the agreement establishing the regional mobility authority, the board of directors of a regional mobility authority shall consist of no fewer than five (5) directors as provided under this section.

(b)

(1) The board of directors shall include the county judge or designated representative of each county that is a member of the regional mobility authority and the mayor or designated representative of each city of the first class that is a member of the regional mobility authority.

(2) If the number of directors is fewer than five (5) after fulfilling the requirements of subdivision (b)(1) of this section, then mayors or designated representatives of the cities of the second class that are members of the regional mobility authority are appointed to the board of directors in descending order of population as determined by the last federal decennial census until five (5) directors have been appointed.

(3) If the number of directors is fewer than five (5) after fulfilling the requirements of subdivisions (b)(1) and (2) of this section, the county judge or designated representative of each county that is a member of the regional mobility authority and the mayor or designated representative of each city of the first class that is a member of the regional mobility authority shall:

(A) Each appoint an additional director to the board of directors; and

(B) If the number of directors is fewer than five (5) after fulfilling the requirement of subdivision (b)(3)(A) of this section, continue to appoint additional directors to the board of directors until:

(i) The number of directors is at least five (5); and

(ii) Each county judge or designated representative of each county that is a member of the regional mobility authority and each mayor or designated representative of each city of the first class that is a member of the regional mobility authority has appointed an equal number of directors to the board of directors.

(c) The designated representative of a county judge or mayor under subsection (b) of this section shall be a qualified elector of the jurisdiction that the designated representative is appointed to represent.

(d) If a city of the second class becomes a city of the first class and is a member of the regional mobility authority, the mayor of that city or designated representative shall become a director.

(e) Membership of cities of the second class on the board of directors shall be adjusted after each federal decennial census.