Key legal question
Whether the annulment of the diploma-recognition decision violated the constitutional principle of good faith.
Extracted holding
No. The erroneous recognition was corrected promptly, the appellant suffered no relevant detriment, and the prerequisites for reliance protection were not met.
Extracted reasoning
Although the appellant could initially rely on the recognition, the authority corrected its mistake within days before any impact on employment or salary occurred; thus there was no protected reliance giving rise to a right to keep the erroneous decision.