They are real. Quotes, industry regulation (you can't sell unless you fulfill regulations), approvals from state bodies...running out of ideas.You can't just hypothesise that everything is due to mysterious non-tariff trade barriers that must exist somewhere in the mist. This is a vague statement of faith. I was focusing on tangible reality, and when you look at the facts you find much of the trade imbalance either does not exist in the first place and has been exaggerated, or exists for reasons other than trade barriers.
Tariffs are only most visible barrier.
Btw, Sout Africa requires that black people own part of business for privilige of importing. How is that not revelant barrier?
EDIT: Added South Africa example