45 CFR §32.3

1. (a)Except as provided in paragraph (b) of this section, whenever a delinquent debt is owed by an individual, the Secretary, or another federal agency collecting a debt on the Department's behalf (See 45 CFR part 30), may initiate proceedings administratively to garnish the wages of the delinquent debtor.
2. (b)The Secretary may not garnish the wages of a debtor who the Secretary knows has been involuntarily separated from employment until the debtor has been re-employed continuously for at least 12 months. The debtor has the burden of informing the Secretary of the circumstances surrounding an involuntary separation from employment.