(a)(1) There shall be deducted from the monthly salary of each member and paid into the fund an amount equal to eight and one-half percent, or ten and one-half percent, if applicable, of his or her monthly salary. An additional amount shall be paid to the fund by the municipality or municipal subdivision in which the member is employed in covered employment in an amount determined by the board: Provided, That in no year may the total of the employer contributions provided in this section, to be paid by the municipality or municipal subdivision, exceed ten and one-half percent of the total payroll for the members in the employ of the municipality or municipal subdivision. Any active member who has concurrent employment in an additional job or jobs and the additional employment requires the police officer or firefighter to be a member of another retirement system which is administered by the Consolidated Public Retirement Board pursuant to article ten-d, chapter five of this code shall contribute to the fund the sum of eight and one-half percent, or ten and one-half percent, if applicable, of his or her monthly salary earned as a municipal police officer or firefighter as well as the sum of eight and one-half percent, or ten and one-half percent, if applicable, of his or her monthly salary earned from any additional employment which additional employment requires the police officer or firefighter to be a member of another retirement system which is administered by the Consolidated Public Retirement Board pursuant to article ten-d, chapter five of this code. An additional amount as determined by the board, not to exceed ten and one-half percent of the monthly salary of each member, shall be paid to the fund by the concurrent employer by which the member is employed.

(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.