Questão jurídica principal
Whether the municipality could increase the landowners' contribution share from 50% to 100% after the 2006 plan had become final in part.
Decisão extraída
No. The 2006 determination of the contribution share had become final and could not be withdrawn absent conditions for revocation.
Fundamentação extraída
The challenged points were not successfully attacked in the earlier proceedings and were therefore binding; a later annulment amounted to an impermissible revocation of a final contribution determination. Protection of legitimate expectations prevailed over a reallocation under equal treatment arguments.