(a) What are the sulphur limits for fuel in use under MARPOL? (5)

(b) What happens if complant fuel cannot be obtained in the port of bunkering? (5)

(c) What if the sulphur analysis resulting from a commercial analysis does not match the bunker delivery note. (5)

(d) What are the timelines for installation of "in use" fuel sampling points on ships? Does it apply for existing ships? (5)