Editing Tisza (section)

== Navigation ==
The Tisza is navigable over much of its course. The river opened up for international navigation only recently; before, Hungary distinguished "national rivers" and "international rivers", indicating whether non-Hungarian vessels were allowed or not. After Hungary joined the [[European Union]], this distinction was lifted and vessels were allowed on the Tisza.<ref>{{Cite web|url=https://iea.uoregon.edu/treaty-text/2003-declarationtiszariverentxt|title=Declaration On Co-Operation Concerning The Tisza/Tisa River Basin And Initiative On The Sustainable Spatial Development Of The Tisza/Tisa River {{!}} International Environmental Agreements (IEA) Database Project|website=iea.uoregon.edu|access-date=2019-02-03}}</ref>

Conditions of navigation differ with the circumstances: when the river is in flood, it is often unnavigable, just as it is at times of extreme drought.<ref>[http://www.noordersoft.com/indexen.html NoorderSoft Waterway Database]; accessed 13 March 2016.</ref>