California Code, Labor Code - LAB § 5307.7

(a) On or before January 1, 2013, the administrative director shall adopt, after public hearings, a fee schedule that shall establish reasonable fees paid for services provided by vocational experts, including, but not limited to, vocational evaluations and expert testimony determined to be reasonable, actual, and necessary by the appeals board.

(b) A vocational expert shall not be paid, and the appeals board shall not allow, vocational expert fees in excess of those that are reasonable, actual, and necessary, or that are not consistent with the fee schedule adopted by the administrative director.