18.15—Protective orders.
        
        (a) 
         Upon motion by a party or the person from whom discovery is sought, and for good cause shown, the administrative law judge may make any order which justice requires to protect a party or person from annoyance, embarrassment, oppression, or undue burden or expense, including one or more of the following:
    
    
    
        
        (2) 
         The discovery may be had only on specified terms and conditions, including a designation of the time or place;
    
    
        
        (3) 
         The discovery may be had only by a method of discovery other than that selected by the party seeking discovery;
    
    
        
        (4) 
         Certain matters not relevant may not be inquired into, or that the scope of discovery be limited to certain matters;
    
    
        
        (5) 
         Discovery be conducted with no one present except persons designated by the administrative law judge; or
    
    
        
        (6) 
         A trade secret or other confidential research, development or commercial information may not be disclosed or be disclosed only in a designated way.