Heidi from Limburg, Belgium, smokes a joint in the Toermalijn coffee shop in Tilburg April 29, 2012. A controversial law that will make it harder for foreign tourists to buy cannabis at the Netherlands' famous coffee shops has been upheld by a Dutch court. The law, which goes into force in three southern provinces on May 1 before going nationwide next year, means coffee shops can only sell cannabis to registered members. Picture taken April 29, 2012. REUTERS/Michael Kooren (NETHERLANDS - Tags: SOCIETY BUSINESS DRUGS TRAVEL)