Haw. Rev. Stat. § 333F-13
A parent, conservator, or other person liable for the support of any person receiving services under this chapter shall be required to pay for the care and treatment of the person. The parent or conservator of a minor receiving services under this chapter shall be liable for the care and treatment until the person has reached the age of majority. The liability of a conservator of a person under this section shall be limited to the estate of the ward and shall not be recoverable out of the individual assets of the conservator. Every person receiving services under this chapter and any property of the person's estate not exempt from execution shall be liable for the expense of the person's care and treatment. The attorney general, whenever requested by the director, shall take any steps that may be appropriate, by civil action if necessary, to enforce any liability established by this section. The attorney general may designate any appropriate county attorney to act in the attorney general's behalf in any enforcement proceeding.
The department, with the approval of the governor and from the funds appropriated to the department for the care and treatment of persons with developmental or intellectual disabilities, may transfer from time to time to the department of human services any amounts that may be requested by the department of human services to match federal funds available under Title XIX of the Social Security Act to assist any indigent or medically indigent persons to pay for the care and treatment of any person receiving services under this chapter. The department may expend federal funds so received for the purposes of this chapter.
HRS § 333F-13