Haw. Rev. Stat. § 521-32: Separation of rents and obligations to property forbidden.

Any agreement, conveyance, or trust instrument which authorizes a person other than the beneficial owner to act as the landlord of a dwelling unit shall operate, regardless of its terms, to authorize and require such person to use rents to conform with this chapter and any other law, code, ordinance, or regulation concerning the maintenance and operation of the premises.