This paper deals with multinational/plurinational substate polities and the interaction of kin-state citizenship in South Tyrol, the Istrian county in Croatia as well as Serbia’s province of Vojvodina. Following the OSCE Bolzano/Bozen Recommendations warning against en masse conferring of external citizenship to national minorities, some have tried to give an answer how stability of intergroup relations can be achieved amidst expanding kin-state involvement This paper sheds light on the role plurinational and multinational regionalisms play in this process. Indicatively, these cases show that often in cases where the relevant minority enjoys a degree of rights in the regional multiethnic polity, conferring kin-state citizenship does not cause inter-ethnic tensions. Through the processes of construction of plurinational/multinational polities and corresponding institutions, competing self-determination projects were largely accommodated and opportunities for radicalisation that the externalisation of ethnic citizenship could have caused were significantly limited.
