Regulations (EC) 883/2004 and 987/2009 on the coordination of social security systems establish common rules and principles which must be observed by all national authorities when applying national law.
Uredbi (ES) št. 883/2004 in 987/2009 o koordinaciji sistemov socialne varnosti določata skupna pravila in načela, ki jih morajo pri uporabi nacionalne zakonodaje upoštevati vsi nacionalni organi.