Question juridique clé
Whether the appellant had acquired a new fiscal domicile abroad before 1 March 2000.
Solution extraite
No. For direct federal tax, a domicile once established in Switzerland remains until a new domicile abroad is proven; here the appellant did not prove such a new domicile.
Motifs extraits
The court upheld its prior case law for mobile ICRC delegates: short missions, employer-driven postings, precarious installation, continued family and economic ties in Switzerland, and lack of proof of foreign tax liability or durable establishment abroad meant no new domicile abroad was shown.