How does enforcement responsibility for Polar Code compliance generally divide between the flag state and a port state the vessel calls at en route to or from polar waters?

A. Port state control is the sole authority for issuing Polar Ship Certificates, with no flag state role

B. The flag state (or its recognised organisation/class society) is responsible for issuing the Polar Ship Certificate and approving the PWOM, while port state control at any port can verify the vessel actually holds a valid, applicable Polar Ship Certificate and that on-board conditions are consistent with it before the vessel proceeds toward polar waters — non-compliance discovered by port state control can result in detention

C. Enforcement responsibility is entirely informal and not actually assigned to either flag state or port state under the Polar Code framework

D. Only the flag state has any enforcement role; port state control has no authority to check Polar Code compliance under any circumstances

A. The Polar Code adds an additional, mandatory layer of requirements on top of the existing SOLAS, MARPOL, and STCW frameworks — it does not replace any of them; a vessel operating in polar waters must comply with standard SOLAS/MARPOL/STCW requirements AND the additional Polar Code requirements specific to polar operation

B. The Polar Code is a voluntary alternative that vessels may choose instead of complying with MARPOL in polar waters

C. The Polar Code only applies to passenger vessels and has no bearing on MARPOL compliance for any other vessel type

D. The Polar Code entirely replaces MARPOL and SOLAS for any vessel operating in polar waters, superseding their requirements

A. MARPOL Annex I imposes no restrictions specific to polar waters beyond what applies globally

B. The HFO restriction applies globally and has no special polar-specific provision at all

C. A prohibition on the carriage and use of heavy fuel oil (HFO, generally defined by density/viscosity criteria) — in Antarctic waters this has applied for some years under MARPOL Annex I Regulation 43, and a phased Arctic HFO restriction/ban has since been adopted, reflecting the heightened environmental consequence of an HFO spill in these especially sensitive and remote regions

D. The restriction only applies to fuel actually being burned, not to fuel simply being carried as cargo or bunkers, regardless of intended use