I don't see mention of the Polish judicial system in the article. It mentions a "a Polish arbitration court whose very existence has been questioned by experts

I don't see mention of the Polish judicial system in the article. It mentions a "a Polish arbitration court whose very existence has been questioned by experts in the country" and "Agnieszka Durlik, director general of the Court of Arbitration of the Polish Chamber of Commerce, says she has never heard of it." If it doesn't exist, then it can't be part of the Polish judicial system.