6. Is there a ban on donations from Trade Unions to candidates?

Art. 168. "(1) A party, a coalition or a nomination committee may not receive the following in connection with the election campaign: ... 2. financial resources from legal persons and from sole traders; ... 
(2) The entities referred to in Items 2 to 5 of Paragraph (1) may not provide any movable and immovable things for gratuitous use in connection with the election campaign, or any gratuitous services in any form whatsoever."

Source: Article 168 (1) and (2), the Election Code, 2014

There is no explicit ban on trade unions making donations to the candidates, but there is a clear ban on legal persons. Since trade unions should be actually registered as legal persons, it may be concluded that this norm should apply to them as well.