1. Act of 5 June 1998 on county government, Dz. U. 2013, item 595.
2. Act of 5 June 1998 on province self-government, Dz. U. 2013, item 596.
3. Act of 7 November 2008 on the European Grouping of Territorial Cooperation, Dz. U. 2008, no. 218, item 1390.
4. Act of 8 March 1990 on municipal self-government, Dz. U. 2013, item 594.
5. Act of 15 September 2000 on the rules of accession of local authorities to international associations of local and regional communities, Dz. U. 2000, no. 91, item 1009.