“…Nowadays, "functional areas form places of many shapes and sizes" (Faludi 2016, p. 308), often cross-cutting the boundaries of administrative units, including state borders. As such, cross-border functional areas result from the cross-border functional integration, which is reflected in socioeconomic interaction in the form of flows or exchanges, essentially of people and goods (Turner et al 2022), often driven by the existing cross-border differentials and asymmetries (Decoville et al 2013). In legal regulations and strategic documents at the EU, national or regional level, there are numerous references to EU regional policy, perceived as an important determinant of supporting the development of functional areas (Kociuba 2015, Rosenkiewicz 2012.…”