I called the the tower for San Diego Intl to notify of my intention to fly and was told that because it was class B airspace it was not permissible, ever, short of exemption for emergency/COA because of need to properly space a/c, which my UAS (P3P) was considered by FAA to be. This runs counter to what I've been told and have read around the forums. She referred me to JO 7210.891 in which it states only under standard or emergency COA. Drone U guys said you only need to notify so long as NoTAM or TR's prohibit at that time. Anyone have experience notifying their local towers in class B?