The State Department has received a request from the Government of Vietnam seeking U.S. help to protect Vietnam's cultural heritage. This request, made under a UNESCO convention from 1970, seeks to impose U.S. restrictions on the import of certain Vietnamese archaeological and ethnological materials. These materials are significant to Vietnam's cultural heritage, and more information will be provided to the public for comment. The document published is a formal notice of this request.
Simple Explanation
The State Department got a request from Vietnam asking for help to stop people from bringing important old things from Vietnam into the U.S., because these things are special to Vietnamese history and culture. They'll give more details later so people can say what they think about it.