Idaho Admin. Code r. 59.01.01.650
The existence of extraordinary gains triggers the possibility that allocations will be made as provided in Section 59-1309, Idaho Code. However, the existence of extraordinary gains does not obligate the retirement board to make an allocation. The Board may choose not to allocate extraordinary gains, or it may choose to allocate all or part of the extraordinary gains. Extraordinary gains exist when, at the close of the fiscal year, the value of plan assets exceeds plan liabilities as determined by the actuary, plus a sum necessary to absorb a one (1) standard deviation market event without increasing contribution rates, as determined by the Board. The amount of extraordinary gains available for possible distribution equals the amount by which the assets exceed the sum of the liabilities and the one standard deviation.
Idaho Admin. Code r. 59.01.01.650