Kernrechtsfrage
Whether the appellants' affiliation with Assura could be challenged again in these proceedings.
Extrahierter Entscheid
No. The ex officio affiliation had already been finally confirmed and could not be reopened; the appellants also showed no coverage transfer to another insurer.
Extrahierte Begründung
The prior cantonal and federal decisions were res judicata. Under the Health Insurance Act, coverage may not lapse between insurers unless the new insurer confirms uninterrupted coverage.