Unemployment Insurance Code section 2657

If the remuneration of an individual is not based upon a fixed period or duration of time or if the individual’s wages are paid at irregular intervals or in such manner as not to extend regularly over the period of employment, the wages for any week or for any calendar quarter for the purpose of computing an individual’s right to disability benefits shall be determined pursuant to authorized regulations. The regulations shall, so far as possible, secure results reasonably similar to those which would prevail if the individual were paid his wages at regular intervals.