Keywords

• Action for annulment
• Principle of legal certainty
• Principle of non-discrimination
• Legal basis
• Principle of proportionality.
• Principle of the protection of legitimate expectations
• Approximation of laws
• Directive (EU) 2017/853
• Control of the acquisition and possession of weapons
• Validity
• Article 114 TFEU
• Amendment of an existing directive
• Absence of impact assessment
• Interference with the right to property
• Proportionality of the measures adopted
• Measures creating barriers in the internal market
• Measures obliging Member States to adopt legislation with retroactive effect
• Derogation for the Swiss Confederation
• Discrimination affecting Member States of the European Union or Member States of the European Free Trade Association (EFTA) other than that State.