The payment required for out-of-system service is the actuarial cost of the service calculated on an individual basis.
Out-of-system service purchase requests are submitted to the system's actuary for determination of the cost.
The purchase of out-of-system service is expensive as it is the actuarial present value of the additional benefits gained as a result of the service purchased.
You should submit a letter requesting the cost of a specific number of years and months of service and provide certification of that service, showing the actual dates of service, from the municipality.