A Dutch judge on Friday upheld the government's plan to introduce a "weed pass" to prevent foreigners from buying marijuana in coffee shops in the Netherlands. Amsterdam, whose scores of coffee shops are a major tourism drawcard, opposes the plan, and mayor Eberhard van der Laan says he wants to hammer out a compromise. A lawyer for coffee shop owners said he would file an urgent appeal against the ruling by a judge at The Hague District court that clears the way for the introduction of the pass in southern provinces on May 1.