Question juridique clé
Whether taxing the petitioner as a non-relative rather than as a grandson violated equality under Art. 8 BV.
Solution extraite
No. After adoption, the prior kinship to the biological family ceases, so the petitioner was not in a comparable situation to a legal grandson.
Motifs extraits
Adoption creates a new parent-child relationship and extinguishes the former family relationship, including kinship to the former family. Since the tax tariff turns on degree of kinship, differential treatment was permissible.