Den sidste del af denne analyse omhandler de subnationalc enheder og myndigheders samspil med det nationale plan (f.eks. via landsdækkende sammenslutninger af subnationale myndigheder), samspillet på og mellem de subnationalc planer nationalt samt internationalt, dvs. inden for rammerne af Euroregioner, partnerskaber eller alle andre former for bi- eller multilateralt samarbejde.
The final part of this analysis deals with interactions of subnational units and authorities with the national level (e.g. through nationwide associations of subnational authorities), on and between the subnational levels of a country and on the international stage, i.e. in the framework of Euroregions, twinnings or other bior multilateral cooperation of all kinds.