(a) Contributions for service.--The employer of a participant shall make employer defined contributions for service of an active participant that shall be credited to the active participant's individual investment account. Employer defined contributions must be recorded and accounted for separately from participant contributions.

(b) Contributions resulting from participants reemployed from USERRA leave.--When a school employee reemployed from USERRA leave makes the mandatory pickup participant contributions permitted to be made for the USERRA leave, the employer by whom the school employee is employed at the time the participant contributions are made shall make whatever employer defined contributions would have been made under this section had the employee making the participant contributions after being reemployed from USERRA leave continued to be employed in the employee's school position instead of performing USERRA leave. The employer defined contributions shall be placed in the participant's individual investment account as otherwise provided by this part.

(c) Limitations on contributions.--No contributions shall be allowed that would cause a violation of the limitations related to contributions applicable to governmental plans contained in IRC § 415 or in other provisions of law. In the event that any disallowed contributions are made, any employer defined contributions in excess of the limitations and investment earnings thereon shall be refunded to the employer by the board.