550.600—How may funds be invested when I act in an exempt fiduciary capacity?
         If you act in an exempt fiduciary capacity under  § 550.580, the funds of the fiduciary account may be invested only in the following:
    
    
    
        
        (b) 
         Other assets as the customer may direct, provided you do not exercise any investment discretion and do not directly or indirectly provide any investment advice for the fiduciary account.