Application of the child support guidelines which would result in a variation by 10 percent or more, but not less than $25, upward or downward, of the current child support obligation, child care obligation, or health care obligation, due to financial circumstances which have lasted 3 months and can reasonably be expected to last for an additional 6 months, establishes a rebuttable presumption of a material change of circumstances.
Neb. Sup. Ct. R. 4-217