(a) The board of directors of a district shall consist of at least seven (7) directors.

(b) The board of directors shall include:

(1) For a statewide district, the members specified in the agreement establishing the district;

(2) For a district composed of a combination of one (1) or more counties and one (1) or more cities:

(A) The county judge or his or her designated representative of each county that is a member of the district;

(B) The mayor or his or her designated representative of each city that is a member of the district; and

(C) If the number of directors is fewer than seven (7) after fulfilling the requirements of subdivisions (b)(2)(A) and (B) of this section, additional members shall be appointed as specified in the agreement establishing the district until a total of seven (7) directors has been appointed;

(3) For a district composed of one (1) or more counties:

(A) The county judge or his or her designated representative of each county that is a member of the district; and

(B) If the number of directors is fewer than seven (7) after fulfilling the requirements of subdivision (b)(3)(A) of this section, additional members shall be appointed as specified in the agreement establishing the district until a total of seven (7) directors has been appointed; and

(4) For a district composed of one (1) or more cities:

(A) The mayor or his or her designated representative of each city that is a member of the district; and

(B) If the number of directors is fewer than seven (7) after fulfilling the requirements of subdivision (b)(4)(A) of this section, additional members shall be appointed as specified in the agreement establishing the district until a total of seven (7) directors has been appointed.

(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.