I needed clear answers about Ukrainian law.
I
found information at https://gram-news.com.ua/naslidky-neyavky-v-sud-st-268-kupap-shho-potribno-znaty-shhob-unyknuty-problem/.
It was hard to find simple info. Most sources were outdated.
I finally understood Article 268.
On this site I found structured info.
Give it a try if you need info on Ukrainian law.