According to the 6th point, the government of the Czech Republic restricts:

operation of art/music schools, language schools with the right to organize state examination and educational facilities providing foreign language courses according to the law no. 117/1995 Coll., defining the rules for state social support is limited. Personal presence in lessons is currently prohibited for the defined list of institutions. The same rules also applies to art/music schools. However, it is possible to organize state examination in language schools with total number of participants (including examiner) not higher than 10.

Full text of the decree (only in Czech).