Questão jurídica principal
Whether the federal nullity complaint was admissible against the debtor instruction
Decisão extraída
The complaint could not proceed as a nullity complaint; it was treated as a constitutional complaint, but only to the extent admissible.
Fundamentação extraída
The Court adhered to its case law that debtor instruction is a sui generis enforcement measure and not a civil action for OG purposes, while leaving room for doctrinal criticism and reclassification only for procedural handling.