1620.5—Annual review.
        
        (a) 
         Priorities shall be set periodically and shall be reviewed by the governing body of the recipient annually or more frequently if the recipient has accepted a significant number of emergency cases outside of its priorities.
    
    
        
        (b) 
         The following factors should be among those considered in determining whether the recipient's priorities should be changed:
    
    
    
    
    
        
        (4) 
         The volume of non-priority emergency cases or matters in a particular legal area since priorities were last reviewed.