The following exemptions apply to weekly earnings. The maximum part of the aggregate disposable earnings of a responsible parent for any workweek that is subject to garnishment or income withholding may not exceed:
1. Supporting spouse or dependent child. When the individual is supporting that individual's spouse or dependent child, other than a spouse or child with respect to whose support that order is used, 50% of that individual's disposable earnings for that week; or
2. Not supporting spouse or dependent child. When the individual is not supporting such a spouse or dependent child described in subsection 1, 60% of that individual's disposable earnings for that week.
With respect to the disposable earnings of any individual for any workweek, the 50% specified in subsection 1 is deemed to be 55% and the 60% specified in subsection 2 is deemed to be 65% if and to the extent that such earnings are subject to garnishment to enforce a support order with respect to a period that is prior to the 12-week period that ends with the beginning of that workweek. In no event may the amount withheld exceed the limitations imposed by 15 United States Code, Section 1673.