1.    As used in this section:

     a.    “Income needed to pay benefits” means the estimate of benefits payable in a given calendar year less the estimate of interest to be earned by the unemployment insurance trust fund for that calendar year.

b.    “Solvency balance” means the income needed, whether a positive or negative figure, in a given rate year to reach the solvency target over the number of years remaining of the period within which the solvency target is to be reached plus the estimate of the amount of income needed to pay benefits.

c.    “Trust fund reserve” excludes all Reed Act [42 U.S.C. § 1103] cash.

2.    For each calendar year, the bureau separately shall estimate the amount of income needed to pay benefits and shall estimate the amount of income needed to reach a solvency balance in the unemployment insurance trust fund, that moves toward the solvency target amount as determined under this subsection. The solvency target is an average high-cost multiple of one. The average high-cost multiple is the number of years the bureau could pay unemployment compensation, based on the reserve ratio, if the bureau paid the compensation at a rate equivalent to the average benefit cost rate in the one calendar year during the preceding twenty calendar years and the two calendar years during the preceding ten calendar years in which the benefit cost rates were the highest. “Reserve ratio” means the ratio determined by dividing the balance in the trust fund reserve at the end of the calendar year by the total covered wages in the state for that year. “Benefit cost rate” means the rate determined by dividing the unemployment compensation benefits paid during a calendar year by the total covered wages in the state for that year. The computation of the reserve ratio and benefit cost rate must exclude the wages and unemployment compensation paid by employers covered under section 3309 of the Internal Revenue Code of 1986, as amended [26 U.S.C. § 3309].

3.    The initial trust fund solvency target must be achieved over a seven-year period from January 1, 2000. After the solvency target required by this section is reached, the calculation of the solvency target must be continued and, if the trust fund reserve as of December thirty-first of any year is less or greater than the solvency target, the rates must be adjusted so that one-fifth of the difference between the solvency target and the current trust fund reserve is estimated to be collected in the following rate year.

4.    Progress toward achieving the solvency target is measured by reducing any difference between one and the average high-cost multiple of the state by an amount that is at least equal to the ratio of the number of years left to reach the solvency target to the difference between the trust fund reserve and the targeted amount. In setting tax rates, the amount of the trust fund reserve may not be allowed to fall below three hundred percent from a standard margin of error for the targeted amount of the trust fund reserve. The executive director may make reasonable adjustments to the tax rates set for a calendar year to prevent significant rate variations between calendar years.

5.    Rates must be determined as follows:

a.    The income needed to pay benefits for the calendar year must be divided by the estimated taxable wages for the calendar year. The result rounded to the next higher one-hundredth of one percent is the average required rate needed to pay benefits.

b.    The positive employer minimum rate in the first rate schedule of the table of rate schedules is one-hundredth of one percent. The positive employer minimum rate in each subsequent rate schedule of the table of rate schedules is the previous rate schedule’s positive employer minimum rate plus one-hundredth of one percent. The negative employer minimum rate needed to generate the amount of income needed to pay benefits is the positive employer minimum rate as described in this subsection plus six percent.

c.    The positive employer minimum rate necessary to generate the amount of income needed to pay benefits must be set so that all the rates combined generate the average required rate for income needed to pay benefits, multiplied by the ratio, calculated under subdivision d, needed to reach the solvency balance. The negative employer maximum rate necessary to generate the    amount of income needed to pay benefits is the negative employer minimum rate necessary to generate the amount of income needed to pay benefits plus three and six-tenths percent. However, the maximum rate must be at least five and four-tenths percent.

d.    The tax rate necessary to generate the amount of income needed to reach a solvency balance must be calculated by dividing the solvency balance by the amount of income estimated as needed to pay benefits and multiplying the resulting ratio times each rate, within the positive and negative rate arrays, with a minimum multiplier of one hundred percent for the negative rate array, as determined under this section to meet the average required rate needed to pay benefits as defined by subdivision a. The ratio calculated under this subdivision must also be multiplied by any rate calculated as required by subsection 6 to arrive at a final rate for a new business. All results calculated under this subdivision must be rounded to the nearest one-hundredth of one percent.

6.     a.    Except as otherwise provided in this subsection, an employer’s rate may not be less than the negative employer minimum rate for a calendar year unless the employer’s account has been chargeable with benefits throughout the thirty-six-consecutive-calendar-month period ending on September thirtieth of the preceding calendar year. If an employer in construction services has not been subject to the law as required, that employer qualifies for a reduced rate if the account     has     been     chargeable     with     benefits     throughout     the twenty-four-consecutive-calendar-month period ending September thirtieth of the preceding calendar year. If an employer in nonconstruction services has not been subject to the law as required, the employer in nonconstruction services qualifies for a reduced rate if the account has been chargeable with benefits throughout the twelve-consecutive-calendar-month period ending September thirtieth of the preceding calendar year. The executive director may provide any negative employer whose contributions paid into the trust fund are greater than the benefit charges against that employer’s account, for a minimum of three consecutive years immediately preceding the computation date or subject to the law as required, with up to a thirty percent reduction to that employer’s rate for any year if that employer has in place a plan approved by the bureau which addresses substantive changes to that employer’s business operation and ensures that any rate reduction provided will not put the employer account back into a negative status.

b.    An employer that does not qualify under subdivision a is subject to a rate determined as follows:

(1) For each calendar year new employers must be assigned a rate that is ninety percent of the positive employer maximum rate or a rate of one percent, whichever is greater, unless the employer is classified in construction services. However, an employer must be assigned within the negative employer rate ranges for any year if, as of the computation date, the cumulative benefits charged to that employer’s account equal or exceed the cumulative contributions paid on or before October thirty-first with respect to wages paid by that employer before October first of that year. All results calculated under this paragraph must be rounded to the nearest one-hundredth of one percent.

(2) New employers in construction services must be assigned the negative employer maximum rate.

(3) Assignment by the bureau of an employer’s industrial classification for the purposes of this section must be the three-digit major group provided in the North American industrial classification system manual, in accordance with established classification practices found in the North American industrial classification system manual, issued by the executive office of the president, office of management and budget. Employers who are liable for coverage before August 1, 2001, remain under an industrial classification under the    two-digit major group provided in the standard industrial classification manual unless they are classified in the construction industry within the standard industrial classification code.

7.    An employer who has ceased to be liable for contributions shall continue its established experience rating account if it again becomes liable within three years from the date that it ceased to be liable providing that the employer’s experience record has not been transferred in accordance with section 52-04-08. The employer’s rate, however, must be determined in accordance with subsection 6.