"bar" is better here. You typically "bar" somebody from doing something, whereas you "ban" something. Unauthorized shipping is banned. Semiconductor-makers are barred from unauthorized shipping. However, I wouldn't go so far as to say that the use of "ban" sounds wrong. "ban" is a more common word and gets used a lot, especially in casual speech. "I've been banned from discussing politics during Christmas dinner, after what happened last year."

Barring is the implementation of banning or, Barring in itself could mean banning as well. Bar in itself has a plethora of meanings though. And by one of its recognized meanings barring is synonymous to banning. Merriam Webster b: PREVENT, FORBID a decision barring his participation So as per Merriam Webster, ' forbidding ' stands legit as well.

Hi, the verb ban refers to making something illegal. The verb bar refers to prohibit entry of something or stop it from happening.

Here, both work. If you ban something, you say it is forbidden or illegal. If you bar something, you prevent it from happening. "These higher tuition fees will bar poor students from receiving a higher education"= it doesn't legally forbid them from getting an education, but it prevents them from actually oing it in the real world.