Haw. Rev. Stat. § 386-94
Claims for services shall not be valid unless approved by the director or, if an appeal is had, by the appeals board or court deciding the appeal. Any claim so approved shall be a lien upon the compensation in the manner and to the extent fixed by the director, the appeals board, or the court.
In approving fee requests, the director, appeals board, or court may consider factors such as the attorney's skill and experience in state workers' compensation matters, the amount of time and effort required by the complexity of the case, the novelty and difficulty of issues involved, the amount of fees awarded in similar cases, benefits obtained for the claimant, and the hourly rate customarily awarded attorneys possessing similar skills and experience. In all cases, reasonable attorney's fees shall be awarded.
Any person who receives any fee, other consideration, or gratuity on account of services so rendered, without approval, in conformity with the preceding paragraph, shall be fined by the director no more than $25,000.
HRS § 386-94