Key legal question
Where is the spouses' principal tax domicile from 2001 for intercantonal taxation purposes?
Extracted holding
Their center of personal interests and principal tax domicile were in X. in the canton of Jura.
Extracted reasoning
The living conditions in Jura were materially superior and more stable than the modest pied-à-terre arrangements at the children's homes in Basel-Country and Solothurn; no alternating domicile existed.