You 100% need it to use a UHF radio, but most people don't get the license for whatever reason. It's a misconception that if the radio is under 2W you don't need it. Here is a good resource for you to look at. positioningsolutions.com/blogs/product-info/how-to-get-your-fcc-license-for-trimble-rtk-gps-radios
Is that 100% you need a license to use uhf? In any of its forms?
You 100% need it to use a UHF radio, but most people don't get the license for whatever reason. It's a misconception that if the radio is under 2W you don't need it. Here is a good resource for you to look at.
positioningsolutions.com/blogs/product-info/how-to-get-your-fcc-license-for-trimble-rtk-gps-radios