105.665.  Cost statement of proposed changes prepared by actuary — contents. — 1.  The legislative body or committee thereof which determines the amount and type of plan benefits to be paid shall, before taking final action on any substantial proposed change in plan benefits, cause to be prepared a statement regarding the cost of such change.

  2.  The cost statement shall be prepared by an actuary using the methods used in preparing the most recent periodic actuarial valuation for the plan and shall, without limitation by enumeration, include the following:

  (1)  The level normal cost of plan benefits currently in effect, which cost is expressed both in estimated annual dollars and as a percent of active employee payroll;

  (2)  The contribution for unfunded accrued liabilities currently payable by the plan, which cost is expressed both in estimated annual dollars and as a percent of active employee payroll and shall be over a period not to exceed thirty years;

  (3)  The total contribution rate expressed both in estimated annual dollars and as a percent of active employee payroll, which contribution rate shall be the total of the normal cost percent plus the contribution percent for unfunded accrued liabilities;

  (4)  A statement as to whether the legislative body is currently paying the total contribution rate as defined in subdivision (3) of this subsection;

  (5)  The plan's actuarial value of assets, market value of assets, actuarial accrued liability, and funded ratio as defined in section 105.660 as of the most recent actuarial valuation;

  (6)  The total post-change contribution rate expressed both in estimated annual dollars and as a percent of active employee payroll;

  (7)  A projection of at least ten years of the current plan provisions compared to the proposed change from the proposed effective date of such change including the total annual contribution requirements expressed both in estimated annual dollars and as a percent of active employee payroll, the actuarial value of assets, the market value of assets, the actuarial accrued liability, and the funded ratio as defined in section 105.660 except that such projection shall not apply to employers within the retirement system established in sections 70.600 to 70.755, but in lieu thereof shall include a prospective schedule of at least ten years containing current provision-estimated employer contributions as a percent of payroll and estimated annual dollars, proposed provision-estimated employer contributions as a percent of payroll and estimated annual dollars, and the resulting difference.  Such schedule shall also contain the estimated difference between the actuarial accrued liability and actuarial value of assets for each scenario;

  (8)  A statement as to whether such additional contributions are mandated by the proposed change;

  (9)  A statement as to whether or not the proposed change would in any way impair the ability of the plan to meet the obligations thereof in effect at the time the proposal is made;

  (10)  All assumptions relied upon to evaluate the present financial condition of the plan and all assumptions relied upon to evaluate the impact of the proposed change upon the financial condition of the plan, which shall be those assumptions used in preparing the most recent periodic actuarial valuation for the plan, unless the nature of the proposed change is such that alternative assumptions are clearly warranted, and shall be made and stated with respect to at least the following:

  (a)  Investment return;

  (b)  Pay increase;

  (c)  Mortality of employees and officials, and other persons who may receive benefits under the plan;

  (d)  Withdrawal (turnover);

  (e)  Disability;

  (f)  Retirement ages;

  (g)  Change in active employee group size;

  (11)  The actuary shall certify that in the actuary's opinion the assumptions used for the valuation produce results which, in the aggregate, are reasonable;

  (12)  A description of the actuarial funding method used in preparing the valuation including a description of the method used and period applied in amortizing unfunded actuarial accrued liabilities.