By definition, PAL is licensed and is afforded interference protection from GAA. PAL licenses will be purchased at auction. There will be up to 70 MHz of PAL spectrum available in any area, which can be chosen from 100 MHz of the CBRS band (3550–3650 MHz).
Many refer to GAA tier users as unlicensed users. However, although GAA users do not require a license, they must meet the FCC’s technical, financial, character, and citizenship qualifications to be eligible as a GAA user. Use cases may differ slightly between PAL and GAA.
The FCC plans to hold the auction of Priority Access Licenses in the 3.5 GHz Citizens Broadband Radio Service on June 25, 2020. Until the PAL channels are auctioned off, full 150 MHz of the band can be used as GAA.