Hawaii Revised Statutes Division 3. Property; Family § 554B-17

(a) A custodial trust terminates on the custodial trustee's receipt of a signed written direction of the beneficiary, if not incapacitated within section 554B-10, or of the beneficiary's conservator, if any, or upon the beneficiary's death. Upon termination, the custodial trustee shall transfer the unexpended custodial trust property:

(b) If, when the custodial trust would otherwise terminate, the distributee is incapacitated, the custodial trust continues for the benefit of the distributee as beneficiary until the incapacity is removed or the custodial trust is terminated by the distributee's conservator.

(c) The death of a beneficiary does not terminate the power of the custodial trustee to discharge obligations of the custodial trustee or beneficiary incurred before the termination of the custodial trust.