If there is a conflict between treaties, it is necessary to apply the interpretation clauses, that are articles 31 and 32 VCLT.
- Textual interpretation
- Systematic interpretation.
- Teleological interpretation
- Historical interpretation
- The principle of effectiveness.
‘If treaties are contrary to jus cogens, jus cogens prevails. If treaties are contrary to the UN Charter, this legal instrument prevails under article 103 of the UN Charter».