Kernrechtsfrage
Whether the supplementary filing of 21 May 2010 was timely
Extrahierter Entscheid
The supplementary brief was filed after the expired federal appeal deadline and could not be considered.
Extrahierte Begründung
The appeal period ran until 11 May 2010; the later submission was therefore late under Art. 100(1) LTF, taking into account the Easter suspension under Art. 46(1)(a) LTF.