Important Topics in International Law (2001-2012):
1. Definition, concept and evolution of IL.
2. Subjects of IL.
3. Recognition.
4. State territory.
5. Law of the sea (1958 as well as 1982 convention).
6. State Jurisdiction.
7. Nationality.
8. Extradition.
9. Asylum (Most Important).
10. Diplomatic agents.
11. Treaties.
12. Security Council especially Veto power.
13. Settlement of disputes (Especially Peaceful means).
14. Intervention.
15. Neutrality.
16. Prize courts.
17. Universal declaration of human rights.

Note: You must also consult 2013 paper because that was the one which broke the tradition.

Good luck!