Vehicles registered in Slovakia were generally assigned to one of the districts (okres) and from 1997 until 2022, the license plate coding (Slovak: EČV, evidenčné číslo vozidla) generally consisted of seven characters and takes the form XX-NNNLL, where XX was a two letter code corresponding to the district, NNN was a three digit number and LL were two additional letters (assigned alphabetically).
From January 2023, a new state-wide numbering scheme was introduced, preserving the same layout, but replacing the initial two-letter district code with arbitrary letters of the alphabet (assigned alphabetically, starting with AA).
[2] The Ministry of Interior of the Slovak Republic held a Facebook poll as the reaction to public dissatisfaction of Bratislava inhabitants with the previously intended BD code.
As the combinations of the BL code are to be exhausted soon, another Facebook poll was organised in November 2018.
All such registrations expired on 1 January 2005; vehicles that had not been re-registered under the new system are not allowed on public roads.