The master or person in charge shall ensure that—
    
    
        
        (a) 
         Flammable and combustible liquids in bulk are not carried, except as allowed by endorsement to the Certificate of Inspection;
     
    
        
        (b) 
         Portable tanks are handled and stowed in accordance with  subparts  and  of this chapter and the provisions of  49 CFR parts 171 through 179 that apply to portable tanks; and
     
    
        
        (c) 
         Grades B and lower liquids are—
     
    
        
        (1) 
         Authorized, by the Commandant, to be carried; and
     
    
        
        (2) 
         Carried only in fixed independent or integral tanks.
     
    [CGD 73-251, 43 FR 56828, Dec. 4, 1978, as amended by CGD 84-043, 55 FR 37413, Sept. 11, 1990]