Article 2 — Scope

1. This Regulation shall apply to cross-border obstacles in land or maritime border regions of neighbouring Member States. 2. This Regulation shall not apply to cross-border obstacles in border regions between Member States and third countries. 3. This Regulation shall be without prejudice to any other Union legal acts, in particular those applicable to the non-judicial resolution of legal issues arising from cross-border obstacles and to the correct interpretation or implementation of Union law. It shall also be without prejudice to the coordination mechanisms established for social security or taxation. 4. Without prejudice to the respective competences of the Union and its Member States, Member States may: (a) provide for procedures under national law to resolve cross-border obstacles; and (b) conclude new international agreements and modify existing agreements that lay down such procedures. Member States may also create ad hoc mechanisms.