(a) The following persons serve as nonvoting ex officio directors:
(1) the manager of the city;
(2) the financial director of the city; and
(3) the planning director of the city.
(b) If an office described by Subsection (a) is renamed, changed, or abolished, the governing body of the city may appoint another city officer or employee who performs duties comparable to those performed by the officer described by Subsection (a).