Haw. Rev. Stat. § 103D-211: Procurement rules.

(a) The procurement policy board shall adopt all rules necessary to carry out the purposes of this chapter and to implement its provisions in accordance with chapter 91. The policy board shall not delegate its power to adopt rules.

(b) No rule shall change any commitment, right, or obligation of the State or of a contractor under a contract in existence on the effective date of such rule.