This is a general info page on BDAs. Additional info:
https://combausa.com/pr/class-a-vs-class-b/
chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://dam.assets.ohio.gov/image/upload/siec.ohio.gov/Public%20Safety%20Communications%20System%20BDA%20Policy%20rev080421.pdf