It isn't. NSK is not a location but a state of mind. The NSK Passport is not so much a joke as a symbolic act of defience, developed by some artists in Slovenia. Here's a quote from the NSK people: "Anybody can become an NSK Passport holder and acquire the status of an NSK citizen. The NSK state denies in its fundamental acts the categories of (limited) territory, the principle of national borders, and advocates the law of transnationality." The following is from their website: "NSK State was founded in 1992 by members of the "Neue Slowenische Kunst" art movement from Slovenia, Europe. NSK State does not exist in the real, three-dimensional space and has no physical territory; it's only territory is the dimension of the Time. NSK is not an internationally officially recognized country and NSK State passport is not a legally valid document. Owning the NSK passport does not grant citizenship of the republic of Slovenia or any other country of the world. YOU CANNOT LEGALLY CROSS ANY INTERNATIONAL BORDER USING AN NSK PASSPORT! The NSK State passport is only a symbolic document and if you use it to cross borders you do so at your own risk: NSKSTATE.COM and the NSK Info. Center cannot accept any responsibility for the consequences if you attempt to cross borders using this passport. " So there it is.