“…Finally, cross-border cooperation itself, referring to a network of more or less formalised and flexible cross-border links between different categories of actors, such as public institutions, non-governmental organisations, entrepreneurs, etc., should be considered an important factor determining the contemporary dynamics of cross-border development (Durand & Decoville, 2020). It fosters not only multifaceted strengthening of cross-border ties (Sousa, 2013), but also economic development of border areas (Basboga, 2020;Howaniec & Lis, 2020 This catalogue is of course not exhaustive. Each of the above factors, however, has a significant impact on the development of functional, and consequently institutionalised cross-border regions, increasing the regional growth potential of border areas (Klatt & Winkler, 2020).…”