34 (3) The police may supply data from a police personal data file concerning the acquisition, possession, transfer, import and export of firearms, firearm components, cartridges or specially dangerous projectiles to an arms control authority of another State if the supplying of the data is essential for arms control. Section 41 Deleting data from the Europol Data System (1) The provisions of Article 21 of the Europol Convention shall be observed when deleting data from the Europol Data System. (2) If personal data that has been supplied to the Europol Information System is deleted from the data system, the European Police Office shall be notified of the deletion of the data. Section 42 Deleting data from the National Schengen Information System (1) The provisions of Articles 112 and 113 of the Schengen Convention shall be observed when deleting data from the National Schengen Information System. Chapter 7 Rights of data subjects Section 43 Providing information about the processing of data When collecting personal data for the purpose of performing duties as referred to in section 1(3) of the Police Act, the police shall be mindful of their obligation to provide information under section 24(1) of the Personal Data Act. This obligation does not apply when the police are collecting, recording or supplying personal data necessary for the performance of duties as referred to in section 1(1) of the Police Act. Section 44 Right of access