As a condition of eligibility for assistance under this section, the person charged with the care and custody of the dependent child or children shall fully cooperate in efforts directed at establishing the paternity of a nonmarital child and obtaining support payments or any other payments or property to which that person and the dependent child or children may have rights. Such cooperation shall be in accordance with federal law, rules and regulations applicable to paternity establishment and collection of support payments.

Except as provided under sub. (5) (a) 1m., when any person applies for or receives aid under this section, any right of the parent or any dependent child to support or maintenance from any other person, including any right to unpaid amounts accrued at the time of application and any right to amounts accruing during the time aid is paid under this section, is assigned to the state. If a minor who is a beneficiary of aid under this section is also the beneficiary of support under a judgment or order that includes support for one or more children not receiving aid under this section, any support payment made under the judgment or order is assigned to the state in the amount that is the proportionate share of the minor receiving aid under this section, except as otherwise ordered by the court on the motion of a party. Amounts assigned to the state under this subd. 1. b. remain assigned to the state until that amount of aid paid that represents the amount due as support or maintenance has been recovered. No amount of support that begins to accrue after aid under this section is discontinued for the recipient may be considered assigned to this state.

Notice of the requirements of this subdivision shall be provided applicants for aid under this section at the time of application.