I'm not sure if this is also true in the US, but the ability to revoke a licence...

hobarrera on Oct 19, 2015 | parent | context | favorite | on: OS X El Capitan License: in Plain English

I'm not sure if this is also true in the US, but the ability to revoke a licence is implicit by law in many places - though the revoker may be liable for any losses caused by the revocation.