When Table 4 references one of the following paragraphs in this section, the materials in the referenced paragraph must not be in components that contact the cargo liquid or vapor:
    
    
        
        (a) 
         Aluminum and aluminum bearing alloys.
     
    
        
        (b) 
         Copper and copper bearing alloys.
     
    
        
        (c) 
         Zinc or galvanized steel.
     
    
    
    
        
        (f) 
         Acetylide forming materials, such as copper, silver, and mercury.