A. Beginning July 1, 2017, the discount rate specified in subsection B of this section applies to service purchases or transfers of service credits to the plan pursuant to the following sections:

1. Section 38-816, subsection C.

2. Section 38-820, subsection A or B.

3. Section 38-821.

4. Sections 38-921, 38-922, 38-923 and 38-924.

B. The discount rate is an amount equal to the assumed rate of return that is prescribed by the board.