Whenever a member has been out of service for five years without having applied for a refund of contributions, the retirement system shall transmit to him by certified mail, return receipt requested, to his last known address, a notification of his rights with respect to the refund of contributions. If the retirement system does not receive any response to the notification within ninety days of mailing, the contributions to which the member is entitled shall be placed to the credit of the pension accumulation fund. Upon a valid request for a refund of contributions, such refund will be made from the pension accumulation fund.
La. Consolidated Public Retirement § 11:782