Haw. Rev. Stat. § 572C-6: Rights and obligations.

Upon the issuance of a certificate of reciprocal beneficiary relationship, the parties named in the certificate shall be entitled to those rights and obligations provided by the law to reciprocal beneficiaries. Unless otherwise expressly provided by law, reciprocal beneficiaries shall not have the same rights and obligations under the law that are conferred through marriage under chapter 572.