Except as otherwise authorized by law, all municipal contracts shall be awarded by:

(1)  Competitive sealed bidding, pursuant to § 45-55-5;

(2)  Competitive negotiations, pursuant to § 45-55-6;

(3)  Non-competitive negotiations, pursuant to § 45-55-7 and § 45-55-8;

(4)  Small purchase procedures, pursuant to § 45-55-9; and

(5)  Qualification-based selection (QBS) process for architects/engineers pursuant to § 45-55-8.1, and program managers, construction managers, or construction managers at risk pursuant to § 45-55-8.2.