I got an email today from AA with the information.
Your Citi® / AAdvantage® Executive World Elite™ MasterCard® benefits just got better. We are pleased to announce authorized users on your account are now allowed access to the Admirals Club® even when you aren’t with them.1
You and your authorized users have access to more than 50 Admirals Club® lounge locations worldwide. Complimentary lounge amenities include drink and light snacks, Wi-Fi access, personal travel assistance with your reservations and much more.
To access the Admirals Club® lounge, your authorized user must present their valid Citi® / AAdvantage® Executive World Elite™ MasterCard®, along with his or her current government-issued I.D. if not accompanied by the primary cardmember.