The inert gas generator must:
    
    
        
        (a) 
         Produce an inert gas containing less than 5% oxygen by volume;
     
    
        
        (b) 
         Have a device to continuously sample the discharge of the generator for oxygen content; and
     
    
        
        (c) 
         Have an audible and visual alarm in the cargo control station that alarms when the inert gas contains 5% or more oxygen by volume.