Haw. Code R. § 6-23-23
Definitions generally applicable to this subchapter are also provided in section 88-21, HRS, and section 6-20-1. As used in this subchapter:
"Informal decision" means a written determination by the system that has not been expressly approved by the board of trustees, to deny a member or petitioner any alleged entitlement to a benefit, service credit, or other alleged entitlement under chapter 88, HRS.
"Petition" means a request for a contested case hearing filed with the system requesting relief from an alleged misapplication or violation of any provision of chapter 88, HRS, or rules promulgated thereunder, setting forth an alleged entitlement to a benefit, service credit, or other alleged entitlement, and meeting the requirements of sections 6-23-24 and 6-23-28.
"Respondent" means any person proceeded against in a petition under this subchapter.
Haw. Code R. § 6-23-23