Questão jurídica principal
Whether the departmental decision of 2 May 2017 was legally valid or void because it contained no substantive operative ruling.
Decisão extraída
The decision was void because it merely dismissed the objection without materially deciding what was to be corrected or annulled.
Fundamentação extraída
The correction sheet was not a decision, and the departmental ruling contained no substantive disposition capable of being altered or reviewed.