Third countries' support to Catalunya's independence can be interpreted as a violation of Spain's sovereignty
PhD candidate Jørgen S. Skjold and PluriCourts affiliated researcher Malcolm Langford wrote an op-ed in the Norwegian newspaper Aftenposten. They clarify what public international law says about the right to self-determination and unilateral declarations of independence.
Skjold and Langford refer to the case-Law of the International Court of Justice and Public international law rules relating to statehood. They conclude that a unilateral secession of Catalunya would violate inernational law. Furthermore, thirs countries should not interfere with internal affairs of Spain, as this might violate Spain's sovereignty.