The guidance was issued to domestic military installations Friday following classified guidelines that were first issued in July by then-Deputy Defense Secretary Bob Work. Friday's guidance was designed to help bases communicate with local communities about the new restrictions.
"The increase of commercial and private drones in the United States has raised our concerns with regards to safety and security of our installations," US Navy Capt. Jeff Davis told reporters at the Pentagon Monday.
Military analysts have long been concerned about the possibility of drones being used against the US for espionage purposes. Additionally, terror groups like ISIS have been able to weaponize commercially available drones, increasingly using them in combat in Iraq and Syria.
It is not clear how the military would down a drone should the need arise but the Defense Department has developed a series of countermeasures capable of bringing down drones. Some of these have been deployed to places like Syria and Iraq. While conventional weapons could be used to shoot down a drone, other countermeasures include non-kinetic methods like the use of radio waves to disrupt drone flight.
Davis explained that drones could now be downed by the military if they are perceived to pose a threat to select military installations that are deemed particularly sensitive.
"These specific guidelines for counter UAS actions in the homeland will remain classified, but, broadly speaking, they allow us to do a range of things," he said using the military's preferred acronym for unmanned aerial systems.
Davis explained that such measures could include "incapacitating them or destroying them," while adding that "they could also be seized as well as part of investigations."
He added that the Pentagon worked closely with the Federal Aviation Administration to devise the new restrictions, and the FAA said that legal authority for the new limits was granted by the National Defense Authorization Act.
"The 2017 enacted National Defense Authorization Act gave the Departments of Defense and Energy authority to mitigate drones in specific environments and to coordinate with the FAA to safeguard the national airspace system," the FAA told CNN in a statement. "The FAA is in the process of coordinating with these agencies as the legislation requires."
But because the rules of engagement are classified, it will be incumbent upon the individual bases to explain to local communities how far away civilian drone operators must stay if they want to avoid having their drones downed by the military.
"We always have had the right of self-defense, but this I think makes it a little bit more solidified what we are able to do, and it's been completely coordinated with the FAA," Davis said.