Article 55 - Production of certificates, etc
Provides that a constable may, if he believes that a person has a firearm or ammunition, demand that he produces a firearm certificate or a European firearms pass. It is an offence for a person in possession of a firearm not to comply with such a demand. If he fails to do so and he fails to show that he is exempt from the requirement of a firearm certificate; or by reason of his place of residence he is not entitled to a European firearms pass for the firearm in question; or he, or the person on whose behalf he is holding the firearm, is recognised under the firearms law of another member State as a collector of firearms or a body concerned in the cultural or historical aspects of weapons, the constable may seize and detain the firearm or ammunition and require the person to declare his name and address. Refusal to declare is an offence.