Subtitle 1Employees' Retirement System § 1. Definitions. § 2. Name and date operative. § 3. Membership. § 4. Service creditable. § 5. Administration; Board of Trustees. § 6. Benefits for Class A and Class B members. § 7. Management of funds. § 8. Method of financing. § 9. Class C membership. § 9.1. Election between plans. § 9.2. Class D membership. § 10. Guaranty. § 11. Exemption from assignment and execution. § 12. Recovery of overpayments. § 13. Limitation of other statutes. § 14. Social Security Act. § 15. Administrative appeal; Judicial review. § 16. Additional opportunity for Class A and Class B members to obtain credit for service and prior service. § 17. Post-retirement benefit increases to certain retirees and beneficiaries. § 17.1. Post-retirement benefit increases on or after July 1, 2007, and before June 30, 2013. § 17.2. Post-retirement benefit increases on or after June 30, 2013. § 17.3. Post-retirement benefit increases for Class D members.