If a member:
(1) does not have at the time of taking office the qualifications required by Sections 201.051 and 201.052(b);
(2) does not maintain during service on the board the qualifications required by Sections 201.051 and 201.052(b);
(3) is ineligible for membership under Section 201.052 or201.053;
(4) cannot, because of illness or disability, discharge the member's duties for a substantial part of the member's term; or
(5) is absent from more than half of the regularly scheduled board meetings that the member is eligible to attend during a calendar year without an excuse approved by a majority vote of the board.