(a) The secretary shall keep and sign the minutes of each board meeting and is the custodian of the authority's minutes and records.
(b) If the secretary is absent from a board meeting, the board shall name a secretary pro tem for the meeting who may:
(1) exercise all powers and duties of the secretary for the meeting;
(2) sign the minutes of the meeting; and
(3) attest all orders passed or other action taken at the meeting.