Legality of "Southeast-Asia Restricted Edition" textbooks being sold in the U.S.?

In researching this topic I was furnished with this link from Google Answers that asks essentially the same question I want to know: Is it legal for sellers to sell these books marked “For Sale only in India, etc.” within the U.S.?

The link is very exhaustive and difficult to parse completely, but it says in closing:

However, this thread was posted 10 Jan 2004. Can anyone verify/confirm if the Google Answers are indeed correct (and still current) on this issue?

AFAIK, nothing has changed.