The principle of solidarity is enshrined in Article 2 of the Treaty on European Union (TEU) and in the preamble of the Charter of Fundamental Rights of the European Union.
Cumhdaítear prionsabal na dlúthpháirtíochta in Airteagal 2 den Chonradh ar an Aontas Eorpach (CAE) agus i mbrollach Chairt um Chearta Bunúsacha an Aontais Eorpaigh.