The bill amends Section 4 of Chapter 32 by adding a new provision that allows employees who have taken unpaid leave for the birth or adoption of a child to purchase creditable service for that leave. Specifically, it enables members in service who have been on unpaid leave for more than one month to establish this period as creditable service by making payments into their retirement system's annuity savings fund. These payments can be made in a lump sum or in installments, as determined by the applicable board of retirement, and must equal the amount that would have been deducted for regular contributions during the period of leave, plus any applicable buyback interest.

Additionally, the bill stipulates that the total creditable service buyback is limited to a maximum of two years. This provision aims to provide employees with the opportunity to enhance their retirement benefits by recognizing their time spent on unpaid leave for family-related reasons.