Again, some incredible BS. The AVNOJ is clear on that, the constituent nations had the right to leave and join the federation, as Yugoslavia was a federation of it's peoples. The Albanians were not constituent, nor a slavic nation and they did not had the right to self-determination according to the constitution. http://www.arhiv.sv.gov.yu/a100008g.htm
Branka Magas bases her reasoning on the 1974 Constitution, which recognized the "equal rights" of the Constituent peoples" and "nationalities".