Where a lien claimant is reimbursed pursuant to subdivision (f) or (g) of Section 4903 or Section 4903.1, for benefits paid or services provided, the appeals board may award an attorney's fee to the applicant's attorney out of the lien claimant's recovery if the appeals board determines that all of the following occurred:
The amount of the attorney's fee out of the lien claimant's recovery shall be based on the extent of applicant's attorney's efforts on behalf of the lien claimant. The ratio of the amount of the attorney's fee awarded against the lien claimant's recovery to that recovery shall not exceed the ratio of the amount of the attorney's fee awarded against the applicant's award to that award.
Ca. Lab. Code § 4903.2