An employee must occupy a position under the retirement system, i.e., be in a current
employment relationship (as distinguished from actually performing services), and
be a member of the retirement system at the time the system is divided. Under certain
conditions individuals hired between the date of division and the date of execution
of the modification covering the divided system may be given a choice regarding coverage.
If the retirement system was covered after December 31, 1959, a member includes an
optional, i.e., an individual who has an option to join the retirement system, but
has not done so.