A.A company should develop a SMS and implement it
B.A company implementing a SMS properly may obtain a DOC
C.Once a company obtains its DOC, each vessel of this company will obtain a SMC
D.DOC is valid for 60 months unless “major non-conformity” is found

A.Passenger ships and high-speed crafts of 500 gross tons or more
B.Oil tankers and Chemical tankers and Gas carriers
C.Bulk freight vessels
D.General cargo vessels