SINGLE-MEMBER DISTRICTS.

(a) The district is divided into five numbered, single-member districts for electing directors.

(b) The board may revise the single-member districts as necessary or appropriate.

(c) As soon as practicable after the publication of each federal decennial census, the board shall revise the single-member districts as the board considers appropriate to reflect population changes. When the board revises the single-member districts under this subsection, the board shall place two of the districts:

(1) entirely within the boundaries of the city of Austin, as those boundaries exist at that time; or

(2) within the boundaries of the city of Austin, as those boundaries exist at that time, but also including unincorporated areas or other municipalities that are surrounded wholly or partly by the boundaries of the city of Austin if the areas or municipalities are noncontiguous to the territory of any other single-member district.

(d) Changes in the boundaries of the city of Austin between revisions of the single-member districts under Subsection (c) do not affect the boundaries of the single-member districts.

(e) When the boundaries of the single-member districts are changed, a director in office on the effective date of the change, or elected or appointed before the effective date of the change to a term of office beginning on or after the effective date of the change, is entitled to serve the term or the remainder of the term in the single-member district to which elected or appointed even though the change in boundaries places the person's residence outside the single-member district for which the person was elected or appointed.