The problem is to determine what is a relic. The law does not define it. In addition, everything that is underground belongs to the government, even on your land. If you find something and give it back you can be accused of destroying relics. Permission that you obtain from the government does not protect you. Sorry for my English. A lot of detectors risk their freedom for our hobby. Recently, the man went out with the detector, someone informed the police, they caught him with two buttons, they made a search at home. He is waiting for the trial. You can check here