Kernrechtsfrage
Whether the taxpayer's main tax domicile for 2009 was in Lucerne or Valais under inter-cantonal double taxation rules.
Extrahierter Entscheid
The natural presumption pointed to Lucerne, and the taxpayer failed to displace it sufficiently; the main tax domicile was in Lucerne.
Extrahierte Begründung
As an unmarried employed person with long-standing weekday residence, a rented apartment, and a full-time job in Lucerne, his center of life was presumed to be there. His ties to Valais were relevant but not strong enough to outweigh the working-place connection.