CA Lab Code Section 4661.5

Notwithstanding any other provision of this division, when any temporary total disability indemnity payment is made two years or more from the date of injury, the amount of this payment shall be computed in accordance with the temporary disability indemnity average weekly earnings amount specified in Section 4453 in effect on the date each temporary total disability payment is made unless computing the payment on this basis produces a lower payment because of a reduction in the minimum average weekly earnings applicable under Section 4453.