Haw. Code R. § 3-11-7
Disbursements may be made from the petty cash fund by the custodian or any other person so delegated with such responsibility in order to achieve operational efficiency and functional practicality.
Each disbursement must be supported by a petty cash voucher conforming substantially to the "Form of the Petty Cash Voucher" dated 06-13-69, at the end of this chapter, which is made a part of this section, and each such petty cash voucher must in turn be supported by the related cash receipt, cash register tape, invoice, freight bill, or other original documentary evidence of disbursement. At an agency's discretion, where the size of the original documentary evidence of disbursement is such that a rubber stamp can be used conforming substantially to the "Form of the Petty Cash Voucher", such rubber stamp may be used in lieu of the separate form.
Each petty cash voucher must be approved by the head of the agency or by an authorized representative other than the custodian.
A single disbursement from a petty cash fund shall not exceed $100; under that limitation, each agency may establish its own policy governing the maximum amount of each disbursement that may be made from a petty cash fund.
Haw. Code R. § 3-11-7