Questão jurídica principal
Whether Art. 19 ZUG applies to stable concubinage and the household of A., B. and C.
Decisão extraída
Art. 19 ZUG does not apply to concubinage relationships; the three-person household was not a support unit under that provision.
Fundamentação extraída
The wording and legislative history of Art. 19 ZUG point to family members in the strict sense, especially spouses and minor children. The provision is a special federal rule for inter-cantonal reimbursement and cannot be extended by analogy merely because cantonal social welfare law treats concubinage similarly.