before April 1, 1988, shall on April 1, 1988, become a member of the fund unless the employee is excluded from membership under section 2 of this chapter.
becomes a member of the fund on the date the individual's employment begins.
becomes a member of the fund on the date the individual's employment begins.
becomes a member of the fund on the date the individual's employment begins.
IC 5-10.3-7-1