Key legal question
Whether the Wallis interim tax assessment violated the constitutional prohibition of double taxation.
Extracted holding
Yes. Wallis could not tax the transferred assets beyond the death date, because the inheritance partition and related transfers had to be treated integrally from the deceased spouse's death for double-taxation purposes.
Extracted reasoning
The same tax base was taxed by multiple cantons for overlapping periods. Given the close factual and legal link between matrimonial property settlement, inheritance division, and advance inheritance, the whole transfer could be linked back to the death date in a practical and coherent way.