The Pension Plan and Pension Fund established herein may be discontinued, modified, altered, terminated or repealed according to law, through an appropriate ordinance or resolutions adopted by the Board of Commissioners; provided, however, that any such amendment or action shall not reduce the vested rights of any Member in his benefits under the Pension Plan. In the event that the Board of Commissioners terminates the Pension Plan or otherwise causes the discontinuance of contributions to the Pension Plan, all Members (including both actively employed Members and terminated Members entitled to, or receiving, benefits under the Pension Plan), to the extent not vested, shall become fully vested in their Accrued Pensions upon the occurrence of any such event.