(a) Revenue bonds must be authorized by a resolution adopted by a majority vote of a quorum of the board. The bonds must:
(1) be signed by the president or vice-president of the board;
(2) be countersigned by the secretary of the board; and
(3) have the seal of the authority impressed or printed on the bonds.
(b) Printed facsimile signatures may be substituted for the actual signatures of the president, vice-president, or secretary.