Haw. Rev. Stat. § 516-104: Revenue bonds; investment of proceeds and redemption.

Subject to any agreement with the holders of its revenue bonds, the corporation may:

(1) Invest its moneys not required for immediate use, including proceeds from the sale of any revenue bonds, in accordance with section 201H-77; and

(2) Purchase its revenue bonds out of any fund or money of the corporation available therefor, and hold, cancel, or resell the revenue bonds.