Unless otherwise authorized by law, all contracts shall be awarded by competitive sealed bidding, pursuant to § 19-11-229, which refers to competitive sealed bidding, except as provided in:
(1) Section 19-11-230, which refers to competitive sealed proposals;
(2) Section 19-11-231, which refers to small procurements;
(3) Section 19-11-232, which refers to proprietary or sole source procurements;
(4) Section 19-11-233, which refers to emergency procurements;
(5) Section 19-11-234, which refers to competitive bidding;
(6) Section 19-11-262, which refers to multiple award contracts; or
(7) Section 19-11-263, which refers to special procurements.