What are IMO's recommendations regarding the issue of Bunker CLCs to ships that are also required to hold a CLC?

(1) issue a Bunker CLC even when the ships concerned also hold a CLC certificate; (2) require ships of 1,000 GT and above flying their flag or entering or leaving ports or offshore facilities in their territory to be insured and to hold a Bunker CLC as prescribed by the Bunkers Convention even when the ships concerned already hold a CLC certificate; and (3) avoid taking action that could cause unnecessary bureaucracy.