(a) Notwithstanding any other provision of this chapter, if the governing board of a school district or a community college district, or a county superintendent of schools establishes regulations pursuant to Sections 44922 and 87483, an employer may enter into a written agreement with an employee who is a member of the Defined Benefit Program to reduce their workload in a position from full time to part time, receive the service credit the member would have received if the member had been employed in that position on a full-time basis and have their retirement allowance, as well as other benefits that the member is entitled to under this part, based, in part, on the final compensation the member would have been entitled to if the member had been employed on a full-time basis. The option to reduce the member’s workload shall be exercised at the request of the member if all of the following conditions are met:

1. (1) The member is employed by either of the following:

   1. (A) A school district or county office of education as a prekindergarten through grade 12 certificated employee who does not hold a position with a salary above the maximum salary of a school principal for that employer.
   2. (B) A community college district.
2. (2) The member has a minimum of 10 years of credited service in the Defined Benefit Program prior to the start of the school term of the first school year of the agreement to reduce the member’s workload.

3. (3) The member shall have been employed on a full-time basis to perform creditable service under the Defined Benefit Program each year of the five school years immediately preceding the first school year in which the member’s workload is reduced, without having a break in service. For the purposes of this paragraph:

   1. (A) Employer-approved leaves of absence, and unpaid absences from the performance of creditable service for personal reasons from full-time employment do not constitute a break in service.
   2. (B) Creditable service that was performed for a school year in which a member reduced their workload pursuant to this section shall be treated as full time, provided that the agreement to reduce the member’s workload was not terminated during that year pursuant to subdivision (e).
   3. (C) The period of time during which a member is retired for service shall constitute a break in service.
4. (4) The member is 55 years of age or older prior to the start of the school term of the first school year of the agreement for which the member’s workload is reduced.

(c) The agreement to reduce the member’s workload shall be in effect prior to the start of the school term of the first school year of the agreement for which the member’s workload is reduced, and shall include the following requirements:

1. (1) The total amount of time in which a member reduces their workload pursuant to this section shall not exceed 10 school years.
2. (2) The reduced workload shall be equal to at least one-half of the time the employer requires for full-time employment in that position in accordance with Section 22138.5.
3. (3) The member shall be paid creditable compensation that is the pro rata share of the creditable compensation the member would have been paid for that position had the member not reduced their workload.
4. (4) For each school year the member’s workload is reduced pursuant to this section, the member shall make contributions to the Teachers’ Retirement Fund in the amount that the member would have contributed if the member had performed creditable service for that position on a full-time basis and if that service was subject to coverage under the Defined Benefit Program.
5. (5) For each school year the member’s workload is reduced pursuant to this section, the employer shall contribute to the Teachers’ Retirement Fund at a rate adopted by the board as a plan amendment with respect to the Defined Benefit Program an amount based upon the creditable compensation that would have been paid to the member if the member had performed creditable service for that position on a full-time basis and if that service was subject to coverage under the Defined Benefit Program.

(e) The agreement to reduce a member’s workload shall be terminated if one of the following actions is taken:

1. (1) The member’s employment is terminated prior to the end of the school term.
2. (2) The member earns less than one-half of the annualized pay rate as defined in Section 22104.8.
3. (3) The member and the employer mutually agree that the member will perform creditable service without making contributions in accordance with paragraphs (4) and (5) of subdivision (c).

(f) Upon termination of the agreement for any of the reasons described in subdivision (e):

1. (1) The employer shall notify the system that the agreement to reduce a member’s workload has been terminated within 30 days of the agreement being terminated.
2. (2) The member’s service credit and contributions for that school year in which the agreement is terminated shall be computed in accordance with Section 22701 and Chapters 15 and 16.
3. (3) That school year in which the agreement is terminated shall not be included in the total amount of time in which a member is allowed to reduce their workload pursuant to paragraph (1) of subdivision (c).
4. (4) Any subsequent agreement to reduce a member’s workload shall meet all of the conditions set forth in this section.