Questione giuridica chiave
Whether the appellants were the payment debtors for the definitive improvement contribution.
Decisione estratta
The liable debtor is the owner of the land at the time the definitive contribution notice is served, regardless of later ownership changes or private sale agreement clauses.
Motivazione estratta
Sections 18 and 20 GBV make the owner at service time the primary obligor. The project had only been definitively completed when all costs were known, and service occurred after the appellants had acquired the parcel.