10.— (1) Where the national unit or a liaison officer considers that data received or provided by the national unit or that officer and processed by the Europol Information System is incorrect or needs to be supplemented, the national unit or the liaison officer concerned shall—

(a) modify, correct or delete as necessary the data concerned, or

(b) request the Europol Information System to modify, correct or delete as necessary that data.

(2) Where the national unit or a liaison officer has reasonable grounds for believing that information provided by another Member State, is incorrect or inaccurate, the national unit or the liaison officer, as the case may be, shall, without delay, notify the provider of the information concerned.

(3) Where the data in relation to a criminal offence has been provided by the national unit or a liaison officer to the Europol Information System and the prosecution for that offence has been abandoned, or the accused person has been acquitted, the national unit shall, as soon as may be, cause those data to be deleted.

(4) Where the national unit deletes from files in the State data which have been provided to the Europol Information System, it shall, as soon as may be, inform Europol accordingly.