This thesis mainly deals with the procedures concerning the youth and children under fifteen years old, including the procedural status of subjects according to Act No. 218/2003 Coll. Youth on liability for unlawful acts of Juvenile Justice and amending certain acts (Act on Juvenile Justice), but the Act No. 40/2009 Coll., Penal Code. Introduction of this thesis is the historical development, both within Austria-Hungary or the Czech Republic after 2003. Its cross section is the interpretation of certain key concepts and principles that are essential to the interpretation and practical application of the Act itself. The chapter on the Institute diversions could not be omitted in this thesis. Using detours is still a new phenomenon for Czech ...