Section 31600 Of Article 5. Financial Provisions From California Government Code >> Division 4. >> Title 3. >> Part 3. >> Chapter 3. >> Article 5.

. A pension, annuity, or retirement allowance is payable in equal monthly installments, but a smaller pro rata amount may be paid for part of a month when the pension, annuity, or retirement allowance begins after the first day of the month or ends before the last day of the month.