Not surprisingly the International Narcotics Control Board, which is charged with promoting  and monitoring compliance with international drug prohibition treaties, is not happy Uruguay ended their marijuana prohibition. From the INCB:

The International Narcotics Control Board (INCB) regrets that the legislation to legalize production, sale and consumption of cannabis for non-medical purposes approved yesterday in Uruguay contravenes the 1961 Single Convention on Narcotic Drugs, to which Uruguay is a party.

The President of the INCB, Raymond Yans said he was “surprised that a legislative body that has endorsed an international law and agreements, and a Government that is an active partner in international cooperation and in the maintenance of the international rule of law, knowingly decided to break the universally agreed and internationally endorsed legal provisions of the treaty”.

There are international forces that are opposed to what Uruguay just did. They will try to encourage Uruguay to move backwards or make their experiment with legalization fail.

For the future of the marijuana reform movement it is critical that Uruguay be allowed to enact their new law without interference to provide an example of how reform could work.

I explore the future of marijuana policy after it is legalized in my upcoming book After Legalization: Understanding the Future of Marijuana Policy. You can support my book at Kickstarter and be one of the first to get a copy.