Key legal question
Whether the child had a relevant need for support and whether Aargau had to reimburse Zurich for emergency support costs under the ZUG.
Extracted holding
The child was needy at least initially because no further necessary funds arrived in time; Aargau had to reimburse Zurich for the emergency support costs.
Extracted reasoning
Family-law maintenance claims count as own means only if they arrive in time. After January 2002 no further alimony covered the foster costs, so need existed and Aargau remained the competent residential canton for reimbursement.