California Code, Government Code - GOV § 75522

(a) A judge is eligible to retire pursuant to this section upon attaining both 65 years of age and 20 or more years of service, or upon attaining 70 years of age with a minimum of five years of service.

(b) The office of a judge who retires under this section becomes vacant on the date of the retirement.

(c) A judge who retires pursuant to this section shall, within 30 days after the effective date of the retirement, elect to receive either the benefits provided by subdivision (d) or the benefits provided by subdivision (e). Under rules adopted by the board, the time for the election may be extended in cases of illness or other hardship, but once made, the election shall be final and irrevocable.

(d) The judge may elect to receive for life a monthly retirement allowance equal to the benefit factor multiplied by the judge's final compensation multiplied by the number of years of service credit.

(e) The judge may elect to receive the amount of his or her monetary credits determined pursuant to Section 75520, including the credits added under subdivision (b) of that section computed to the last day of the month preceding the date of distribution. Under rules adopted by the board, the judge may elect to receive that amount in a single payment, or may direct that it be paid in an annuity of actuarially equivalent value for the judge's life or in one of the optional forms provided for in Section 75571if the judge retires on or before December 31, 2017, or Section 75571.5 if the judge retires on or after January 1, 2018.

(f) If a retired judge fails or refuses to make an election pursuant to subdivision (c) within the time allowed, he or she shall be deemed to have elected to receive a monthly retirement allowance under subdivision (d).