143.23. A person qualified for membership in this plan under section 143.2 on 1 January 2005, who held pensionable employment under this plan and pensionable employment under the Government and Public Employees Retirement Plan or the Pension Plan of Management Personnel in a non-simultaneous manner and who, on 31 December 2004, held pensionable employment under one of those two last plans, shall continue to be a member of the latter plan from 1 January 2005, unless the person elects to become a member of this plan by sending a notice to that effect to the Commission before 30 June 2006.
The years and parts of a year of service credited under this plan and those for which pension credit was granted to the person referred to in the first paragraph who did not elect to become a member of this plan must be credited under the Government and Public Employees Retirement Plan or the Pension Plan of Management Personnel, in accordance with the first paragraph of section 143.5 or 143.9. The second and third paragraphs of this section apply.
If the person referred to in the first paragraph elects to become a member of this plan, membership begins on 1 January 2005. Section 143.3, 143.4, 143.6 or 143.7 applies on that date.