are entitled to become, at their option, members of the fund. A member of the general assembly who completed his service before July 1, 1987, in order to become a member of the fund must apply to the board for membership and must present evidence satisfactory to the board of his prior service. Such a member of the general assembly may become a member without any service after June 30, 1987.
and who is occupying a position normally requiring performance of services of less than one thousand (1,000) hours a year may at his option be a member of the fund.
IC 5-10.3-7-3