Indiana Code Title 5. State and Local Administration § 5-10.3-2-4

Sec. 4. (a) The following definitions apply throughout this section:

(b) Except as otherwise provided in this section, if an eligible entity wishes to offer a retirement plan to a qualifying employee, the eligible entity must provide the retirement plan to the qualifying employee by participating in the fund or the defined contribution plan.

(c) If, on July 1, 2015, an eligible employer is providing a retirement plan other than the fund or the defined contribution plan to a departmental, occupational, or other definable classification of an eligible entity's employees, the qualifying employees in the departmental, occupational, or other classification of employees may continue to participate in the retirement plan, regardless of whether the qualifying employees in the departmental, occupational, or other definable classification begin employment with the eligible entity after June 30, 2015.

(d) An eligible entity may offer a retirement plan other than the fund or the defined contribution plan to an employee, if the employee is not a qualifying employee.