(1) The mayor of the city and county of Denver or the deputy mayor shall be ex officio a director.

(2) Except as otherwise provided in this article, the other directors shall be chosen as provided in this section.

(3) (a) Two directors shall be appointed to the board by the city council of the city and county of Denver after the second Tuesday in January in each odd-numbered year and by the twentieth day of January in such year. One director shall be appointed to the board by such city council during such part of January in each even-numbered year.

(b) Each director appointed pursuant to this subsection (3) shall be a member of such city council and shall remain as such during his term of office as director.

(4) (a) A director shall be appointed to the board by the board of county commissioners of each of the counties of Adams and Boulder and by the city council of the city and county of Broomfield after the second Tuesday in January in each odd-numbered year and by the twentieth day of January in such year; except that, in 2001, the city council of the city and county of Broomfield shall appoint a director after November 15, 2001. A director shall be appointed to the board by the board of county commissioners of each of the counties of Arapahoe, Douglas, and Jefferson during such part of January in each even-numbered year.

(b) Each director appointed pursuant to this subsection (4) shall be a member of the board of county commissioners appointing him to be a director and shall remain as such during his term of office as director.

(5) (a) A director shall be appointed to the board by the governor from each of the counties of Arapahoe and Jefferson after the second Tuesday in January in each odd-numbered year and by the twentieth day of January in such year. A director shall be appointed to the board by the governor from each of the counties of Adams and Boulder during such part of January in each even-numbered year.

(b) Each director appointed pursuant to this subsection (5) shall be an executive officer of a municipality with a population of one hundred thousand or less, as determined by the latest Denver regional council of governments' estimate, which is located wholly or in part in the county from which he is appointed, shall be a resident of such county, and shall remain as such an executive officer and such a county resident during his term of office as director.

(5.5) The mayor or the mayor pro tem of any city located within the district and having a population in excess of one hundred thousand, as determined by the latest Denver regional council of governments' estimate, shall be ex officio a director.

(6) (a) On or after the twenty-first day of January of each year but on or before the last day of January in such year, a director shall be appointed to the board by such board, including as members thereof for the purposes of this subsection (6) each director newly appointed in such month to the board as provided in subsections (3) to (5) of this section, and including each incumbent director whose regular term of office does not end on the last day of such month, but excluding each incumbent director whose regular term of office ends on the last day of such month.

(b) Each director appointed pursuant to this subsection (6) shall be a professional engineer licensed by the state, an elector of the district, and not an officer in the regular employment of any public body. Each such director shall remain so qualified during his or her term of office as director.

(c) No director appointed pursuant to this subsection (6) shall be deemed to be in the regular employment of such a public body designated in paragraph (b) of this subsection (6) merely because the director or an engineering firm of which he is a member or with which he is otherwise associated is engaged as an independent contractor by the public body.

(d) For the purposes of this subsection (6), a quorum of the board shall constitute a majority of the body composed of the mayor of the city and county of Denver or the deputy mayor and such other directors authorized to appoint such remaining director as provided in paragraph (a) of this subsection (6). Each such appointment shall be by motion adopted by a majority of such directors, including the mayor or the deputy mayor, constituting a quorum.

(e) The secretary of the board shall give at least five days' mailed notice of a special or regular meeting designated by the board for considering each such appointment. Such notice shall be addressed to each such director authorized to make such a remaining appointment at the mailing address designated by him in the records of the district.

(7) Each appointing authority designated in subsections (3) to (6) of this section shall cause each newly appointed director, each other appointing authority, the mayor of the city and county of Denver or the deputy mayor, and the secretary of the board to be notified forthwith of each such appointment.

(8) If any appointing authority designated in subsections (3) to (6) of this section fails to appoint any director to the board as therein provided and to cause notification of such appointment to be given pursuant to subsection (7) of this section, at the time, subject to the limitations, and otherwise as provided in said subsections (3) to (6), the governor forthwith shall make such appointment and shall cause notice thereof to be given as provided in said subsections (3) to (6) for the appointing authority.

(9) Except as otherwise provided in this article, any incumbent may be reappointed as a director to the board.