Pursuant to the Regulation of the Council of Ministers of 25 March 2022 on establishing specific restrictions, orders, and prohibitions in relation to the state of epidemic (Polish Journal of Laws, item 673),
from 28 March 2022 onwards, all restrictions are lifted, which means that wearing mask is not obligatory.

 

Source:  https://www.gov.pl/web/coronavirus/temporary-limitations

Exhibitors of previous editions