3AFI31-209 governs installation security in the United Kingdom, including procedures, security force responses, and training for intruders.
View 3AFI31-209 on armypubs.army.mil
3AFI31-209 addresses joint US-UK policing, legal authority, physical security, force protection, and UK-specific law enforcement objectives. It requires procedures for responding to intrusions, securing evidence, protecting personnel, and documenting security disruptions.
Security Forces personnel may take all appropriate measures to ensure the maintenance of good order and security on USAF occupied bases. (paragraph 2)
Security Forces personnel must follow applicable DoD and Combatant Commander directives, regulations and USAF instructions when carrying out their security responsibilities. (paragraph 2)
UK or third-country national civilians are not subject to the UCMJ or US law and must therefore be turned over to UK police authorities, as soon as practicable, if they are detained on suspicion of committing a crime or posing a risk to the security of the installation. (paragraph 2)
Close installation entry and exit gates as soon as possible upon notification of intrusion activity. (paragraph 3)
Conduct a search of the effected areas to ensure all intruders are detained and any devices or other evidence is found. (paragraph 3)