Haw. Code R. § 16-23-70
All costs incurred in the operation of the joint underwriting plan bureau and the operation of the plan, such as administrative, staff, and claims (other than assigned claims) paid, shall be allocated fairly and equitably among the JUP members.
The allocations shall be computed on a "share of the voluntary market" basis.
Allocation of private passenger non-fleet experience will be on the basis of net direct written car years.
Allocation of commercial and all other experience will be on the basis of net direct written premiums.
Member insurers or the statistical agencies designated by them shall report all of the data necessary to comply with the allocation procedures to the commissioner or agent designated by the commissioner. Each insurer shall permit its statistical agent to release such data to the commissioner or agent designated by the commissioner.
Haw. Code R. § 16-23-70