a payment of contributions plus interest for any previous ACERA retirement service time
                                                            
                                                     
                        
                                                
                        
                        
                            a repayment to the retirement fund to cover a period of service during which retirement deductions were withheld but later refunded
                                                            
                                                     
                        
                                                
                        
                        
                            A sum of money paid into CSRS by an employee (or a survivor) to get credit for a period of Federal civilian service for which a refund of retirement contributions was received. (Not allowable for FERS service.))