Haw. Rev. Stat. § 303-4: Adoption of rules.

Each employer may adopt rules to implement this chapter including but not limited to:

(1) The method of filing an election to accept an adjustment in earnings and revocation of the election;

(2) The effective date of an election;

(3) Changes in the amount of the adjustment in earnings; and

(4) Selection of the insurance company or companies from which the annuity contracts are to be purchased or to which payments into a qualified custodial account are to be made.