Sounds like the "New World Order" has been around for a lot longer than anyone thought.
They are to worldwide shipping what UL (Underwriters Laboratories) is to electrical products. Without a UL label it can't be sold.
There are also the CE labeled products, but in the Middle East, many products are sold without either of these labels or fake (Chinese) certification.
The offending port would also have all of its contracts canceled, including any for ports-of-call military contracts that we, the Russians, Chinese, etc. may have.
What would the repercussions be if, say, the Russians or Chinese just said "scr*w Bureau Veritas and went their own way? If they were also cut out of the world markets, that would be a significant loss of trade.
BTW- Iran can just import/export from the Dubai free trade zones.