Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Czech regional championships (Czech: krajské přebory, singular: krajský přebor) are the 5th-tier football competitions in the Czech Republic outside of Prague, where the 5th tier league is called Prague Championship. There are 13 groups, each played within individual reagion. There are 16 teams in most groups, only in the four smallest regions 14 teams play.
The best teams from each region are protomed to the fourth divisions (divize), the lowest-placed teams are relegated to I.A classes (I.A třídy).
Czech football regional championships (including Prague Championship)