13.503—Eligibility: Experience.
        
        (1) 
         90 days of service as an engineering officer on tankships or self-propelled tank vessels certified to carry DL or LG appropriate to the endorsement applied for;
    
    
        
        (2) 
         90 days of rating or cadet service in the engine department on tankships or self-propelled tank vessels certified to carry DL or LG appropriate to the endorsement applied for; or
    
    
    
        
        (b) 
         Each applicant already holding an MMD or MMC endorsed as Tankerman-Engineer for DL and seeking one for LG, or the converse, shall prove at least half the service required by paragraph (a) of this section.
    
    [CGD 79-116, 60 FR 17142, Apr. 4, 1995, as amended by CGD 79-116, 62 FR 25134, May 8, 1997; USCG-2006-24371, 74 FR 11260, Mar. 16, 2009]