(2) The board may, on the recommendation of the board's actuary, increase the employees' contribution rate from eight and one-half percent to ten and one-half percent should the plan not be seventy percent funded by July 1, 2014. The board shall decrease the contribution rate to eight and one-half percent on July 1 following the acceptance by the board of an actuarial valuation determining that the plan is seventy-five percent funded. If the plan funding level at a later actuarial valuation date falls below seventy percent, the employee rate of contribution shall be increased to ten and one-half percent of salary until the seventy-five percent level of funding is achieved. The board shall change the employee contribution rate on July 1 following the board's acceptance of the actuarial valuation. At no time may the rate of employee contribution exceed the rate of employer contribution.
(b) All required deposits shall be remitted to the board no later than fifteen days following the end of the calendar month for which the deposits are required. If the board on the recommendation of the board actuary finds that the benefits provided by this article can be actuarially funded with a lesser contribution, then the board shall reduce the required member and employer contributions proportionally. Any municipality or municipal subdivision which fails to make any payment due the Municipal Police Officers and Firefighters Retirement Fund by the fifteenth day following the end of each calendar month in which contributions are due may be required to pay the actuarial rate of interest lost on the total amount owed for each day the payment is delinquent. Accrual of the loss of earnings owed by the delinquent municipality or municipal subdivision commences after the fifteenth day following the end of the calendar month in which contributions are due and continues until receipt of the delinquent amount. Interest compounds daily and the minimum surcharge is $50.
(c) If any change or employer error in the records of any participating public employer or the retirement system results in any member or retirant receiving from the system more or less than he or she would have been entitled to receive had the records been correct, the board shall correct the error and as far as is practicable shall adjust the payment of the benefit in a manner that the actuarial equivalent of the benefit to which the member or retirant was correctly entitled shall be paid. Any employer error resulting in an underpayment to the retirement system may be corrected by the member or retirant remitting the required employee contribution and the participating public employer remitting the required employer contribution. Interest shall accumulate in accordance with the legislative rule 162 CSR 7 (retirement board reinstatement interest) and any accumulating interest owed on the employee and employer contributions resulting from the employer error shall be the responsibility of the participating public employer. The participating public employer may remit total payment and the employee reimburse the participating public employer through payroll deduction over a period equivalent to the time period during which the employer error occurred.