Cal. Government Code - GOV § 75580. Section 75580.
(a)
If a judge who is retired for disability engages in the practice of law or other gainful occupation that requires the discharge of duties substantially similar to those duties that the judge was found, pursuant to Section 75560.1, to be unable to perform due to mental or physical disability, the retirement allowance otherwise payable to him or her shall cease permanently, except as provided in this section.
(b)
If a retired judge becomes entitled to any salary for assignment to a court by the Chairperson of the Judicial Council after retirement for disability, the retirement allowance otherwise payable shall, during the time he or she is entitled to receive that salary or other compensation, be reduced by the amount of that salary or compensation.
(c)
A judge who is retired for disability may, without loss or reduction in allowance, engage in the practice of law or any other gainful occupation that does not require the discharge of duties substantially similar to those duties the judge was found, pursuant to Section 75560.1, to be unable to perform due to mental or physical disability, other than a public office, as long as the compensation earned in any month when combined with the judge’s allowance does not exceed 75 percent of the salary payable to the judge holding the judicial office to which the retired judge was last elected or appointed, and the retirement allowance otherwise payable to the judge shall be reduced by the amount of any earning in excess of that amount. The judge shall report the compensation earned during each month to the board by the eighth day of the following month.
(d)
Persons affected by this section shall report all compensation earned in a form and manner required by the board under penalty of perjury. The board shall have the authority to require these persons to grant the board permission to request wage information for the purposes of verifying the reported compensation earned. The Employment Development Department shall report compensation in a form and manner required by the board in accordance with Section 1798.24 of the Civil Code. The board shall reimburse the Employment Development Department for the costs that the department incurs in searching for and providing that information.
(e)
When a judge affected by subdivision (c) reaches the age at which the judge would be eligible to retire for services pursuant to Section 75522 had the judge not retired for disability, the judge’s retirement allowance shall be made equal to the amount it would be if not reduced pursuant to this section, and may not again be modified for any cause.
(f)
A judge who is retired for disability pursuant to this chapter or becomes entitled to any salary for assignment to a court by the Chairperson of the Judicial Council after retirement for disability pursuant to this chapter is not eligible to receive service credit in another public retirement system or pursuant to this chapter or to be reinstated to this system.
(g)
The Legislature reserves the right to increase or reduce the benefits prescribed by this section as it may find appropriate.