The commissioner may require any self-insurer to provide a bond or additional bond, cash, and securities or additional securities in a reasonable amount whenever the commissioner finds that the same is necessary or appropriate. The commissioner may also require the self-insurer to provide evidence of excess liability insurance (in excess of the self-insured retention) in a licensed insurer in an amount the commissioner finds appropriate in light of such factors as the exposure, the number of vehicles involved, and the financial condition of the self-insurer.
Haw. Code R. § 16-23-25