The plan allegedly violated the Vienna Conventions, which regulate global diplomacy.

In 1985, the Vienna Convention was adopted to formalize international cooperation on this issue.

It updated an earlier treaty, the 1985 Vienna Convention on the ozone layer.

Article 34 of the Vienna Convention applies to itself so that like other treaties it cannot bind third parties.

In all three cases, the Vienna Convention was violated, Mexico argues.

By law, road signs in the Philippines follow the Vienna Convention.

"Ever hear of the Vienna Conventions on diplomatic and consular relations?"

It cannot be allowed to hide behind the Vienna Convention.

What did the Vienna Convention say about that?

Many countries in Europe are party to the Vienna Conventions on traffic and roads.