The amount to be withheld from the parent-employee’s disposable income under any order to withhold and transmit earnings entered pursuant to sections 42-364.01 to 42-364.12 shall not in any case exceed the maximum amount permitted to be withheld under section 303(b) of the Consumer Protection Credit Act, 15 U.S.C. § 1673(b)(2)(A) and (B), nor shall any amount withheld to satisfy a child or spousal support arrearage, when added to the amount withheld to pay current support and the fee provided for in subdivision (3) of section 42-364.01, exceed such maximum amount.