This commitment was underlined by the inclusion in the Single European Act (1987) of provisions dealing with what was called 'economic and social cohesion'.
Cuireadh beim ar an gceangal seo leis na forálacha a cuireadh isteach san lonstraim Eorpach Aonair (1987), a bhi ag pie le "comhtháthú geilleagrach agus sóisialta", mar a thugtar air.