45.34—What is the law governing ex parte communications?
        
        (a) 
         Ex parte communications with the ALJ or his or her staff are prohibited in accordance with 5 U.S.C. 554(d).
    
    
        
        (b) 
         This section does not prohibit ex parte inquiries concerning case status or procedural requirements, unless the inquiry involves an area of controversy in the hearing process.