Ed. Code, § 24211

When a member who has been granted a disability allowance under this part after June 30, 1972, returns to employment subject to coverage under the Defined Benefit Program and performs:

(a) Less than three years of creditable service after termination of the most recent disability allowance, the member shall receive a retirement allowance which is the sum of the allowance calculated on credited service accrued after the termination date of the disability allowance, excluding credited service accrued or granted pursuant to Section 22717 or 22717.5 or Chapter 14 (commencing with Section 22800) or Chapter 14.2 (commencing with Section 22820) or Chapter 19 (commencing with Section 23200), the age of the member on the last day of the month in which the retirement allowance begins to accrue, and final compensation using compensation earnable or projected final compensation, or a combination of both, plus the greater of either of the following:

(1) A service retirement allowance calculated on credited service accrued as of the effective date of the disability allowance, excluding credited service accrued or granted pursuant to Section 22717 or 22717.5 or Chapter 14 (commencing with Section 22800) or Chapter 14.2 (commencing with Section 22820) or Chapter 19 (commencing with Section 23200), the member’s age on the last day of the month in which the retirement allowance begins to accrue, and projected final compensation to the termination date of the disability allowance.

(2) The disability allowance the member was eligible to receive immediately prior to termination of the most recent disability allowance, excluding children’s portions.

(b) Three or more years of creditable service after termination of the most recent disability allowance, the member shall receive a retirement allowance that is the greater of the following:

(1) A service retirement allowance calculated on all actual and projected service, excluding credited service accrued or granted pursuant to Section 22717 or 22717.5 or Chapter 14 (commencing with Section 22800) or Chapter 14.2 (commencing with Section 22820) or Chapter 19 (commencing with Section 23200), the member’s age on the last day of the month in which the retirement allowance begins to accrue, and final compensation using compensation earnable, or projected final compensation, or a combination of both.

(2) The disability allowance the member was eligible to receive immediately prior to termination of the most recent disability allowance, excluding children’s portions.

(c) The allowance shall be increased by an amount based on any credited service accrued or granted pursuant to Section 22714, 22715, 22717, or 22717.5 or Chapter 14 (commencing with Section 22800) or Chapter 14.2 (commencing with Section 22820) or Chapter 19 (commencing with Section 23200), the member’s age on the last day of the month in which the retirement allowance begins to accrue, and final compensation using compensation earnable, or projected final compensation, or a combination of both.

(d) If the total amount of credited service, other than projected service or credited service that accrued or was granted pursuant to Sections 22714, 22715, 22717, 22717.5, and 22826, except as provided in subdivision (c) of Section 22121, is equal to or greater than 30 years, the amounts identified in subdivisions (a) to (c), inclusive, shall be calculated pursuant to Sections 24203.5 and 24203.6.

(e) Benefits calculated pursuant to this section shall not take into consideration the benefit comparison described in Section 24203.8.

(f) Upon retirement, the member may elect to modify the service retirement allowance payable in accordance with any option provided under this part.