Question juridique clé
Whether the 1994 declaratory decision could be declared null because it allegedly misclassified the farm and ignored leased land.
Solution extraite
The defects alleged were not serious, obvious, and exceptional enough to justify nullity; at most the decision was appealable, not void.
Motifs extraits
Nullity of administrative acts is exceptional. Errors in factual assessment, legal application, or discretion normally do not nullify a decision, especially where legal certainty prevails. The disputed classification was at most a difficult borderline assessment.