To unrelax, make stricter. This is about removing the current policy of allowing people into the country without a visa...undoing it.
Now I'm LOL at myself. First of all, you are correct that it appears they are tightening up the policies. (Have to tell you I have a problem with "anyone" coming here without full visa processing though.) What I'm laughing about is my reading of your UN-relaxing comment. I read it as:Psssst. Read the article...it's about the UN relaxing visa policies. LOL!
Of course you didn't include the "the" and you hyphenated the un-relaxing. I belive the capitalization for emphasis led me to read it that way, but I know you wanted to provide emphasis on the "un" part. Thus my references to the UN.