The Trump administration is applying a 100% tariff on imports of certain unmanned aircraft systems and their components, Bloomberg reported Thursday.

The 100% rate will apply to drones of a certain size or those with national security capabilities, while other imports will face lower duties, the report said. The levies will take effect for many products in 21 days.

Smaller drones without national security capabilities will face a 25% tariff, while drones from countries with trade agreements with the US will be subject to rates set under those agreements, Bloomberg said.

The measures could heavily affect China, the dominant manufacturer of remote controlled aerial vehicles, the report said.