República Checa
Recurso a agentes de aduanas
Articles 15, 31, 62 of Act no. 242/2016 Col., the Customs Act
https://aplikace.mvcr.cz/sbirka-zakonu/SearchResult.aspx?q=242/2016&typeLaw=zakon&what=Cislo_zakona_smlouvy
The legislation does not require compulsory use of brokers.