A reform in effect since January 2003 replaced the districts with 205 Administrative Districts of Municipalities with Extended Competence (abbreviated AD MEC;
správní obvody obcí s rozšířenou působností, abbreviated
SO ORP), also called third-level municipalities, or unofficially "little districts". These
municipalities took over most of the administration of the former district authorities. The old districts still exist as territorial units and remain as seats of some of the offices, especially
courts,
police and
archives. In 2007, the borders of the districts were slightly adjusted and 119 municipalities were moved into different districts. In 2021 another reform was made and 18 municipalities were moved between districts or between administrative districts of municipalities with extended competence. After the 2021 reform, borders of AD MECs respect borders of districts, with only exception granted by law being AD MEC of Turnov, which is partly in districts of Semily, Jablonec nad Nisou and Liberec. The reasons are the vastness of this territory and different requirements of the territory's population. ==Municipalities with commissioned local authority==