Haw. Code R. § 6-23-2
Definitions applicable to this subchapter are also provided in section 88-21, HRS, and sections 6-20-1 and 6-22-2. As used in this subchapter:
"Causation" refers to a finding as to whether or not a member's disability or death is:
(1) The result of an accident occurring while in the actual performance of duty at some definite time and place; or
(2) The cumulative result of some occupational hazard; or
(3) The result of wilful negligence on the part of the member.
"Petition" means a request filed with the system pursuant to section 6-23-4, in which an applicant for disability retirement benefits or accidental death benefits disputes the system's preliminary decision regarding the medical board's or designated entity's certifications and findings.
Haw. Code R. § 6-23-2