Past-due support
Past-due support means the amount of support determined under a court order or an order of an administrative process established under State law for support and maintenance of a child, or of a child and the parent with whom the child is living, which has not been paid. Through September 30, 2007, for purposes of referral for Federal tax refund offset of support due an individual who is receiving services under 302.33 of this chapter, past-due support means support owed to or on behalf of a qualified child, or a qualified child and the parent with whom the child is living if the same support order includes support for the child and the parent.
Source
45 CFR § 301.1
Scoping language
When used in this chapter, unless the context otherwise indicates: