 The Act makes it illegal to conduct any operations (including any diving or excavation) within the controlled site that might disturb the remains unless licensed to do so by the Ministry of Defence.Licences have been granted for excavation of aircraft, provided that it is not thought that there are human remains present or unexploded ordnance.In the case of sunken vessels, any activities necessary, such as the recovery of extant human remains and the sealing of openings into wrecks, is generally carried out by Ministry of Defence diving teams.