Our FCC certification is subject to this:
"This module is approved for installation into mobile and/or portable host platforms and must not be colocated or operating in conjunction with any other antenna or transmitter except in accordance with FCC multi-transmitter guidelines. End users must be provided with transmitter operating conditions for satisfying RF Exposure compliance."
It's always best to consult with an accredited test facility for the latest rule guidance.
See Application Note Bluetooth and Regulatory Compliance for full details.