N.C. Gen. Stat. 50-13.4 requires the North Carolina Conference of Chief District Court Judges to prescribe uniform statewide presumptive guidelines for determining the child support obligations of parents, and it requires that the chief judges review the guidelines periodically (at least once every four years) to determine whether their application results in appropriate child support orders. The Conference of Chief District Court Judges currently is reviewing the statewide presumptive child support guidelines.