During the inspection of the machinery spaces on board for oil and oily mixtures, the port state control officer (PSCO) may determine and verify:

A
Whether the responsible officer is familiar with the handling of the sludge and bilge water,
B
If the allege of the sludge tank is sufficient for the expected generated sludge during the next intended voyage.
C
Whether the oily bilge water is retained on board for subsequent discharge to a reception facility, in accordance with Annex I of MARPOL 73/78
D
A+B+C
E
A+B