The UN Drug Control Board (INCB) has notified the German government that its planned legalization of cannabis is not compatible with existing international regulations. The UN agency pointed out that the 1961 UN Drug Convention states that cannabis use is only permitted for medical and scientific purposes, the INCB stated in its annual report released on Tuesday. Another UN convention from 1988 stipulates that the cultivation, production and distribution of the drug for other purposes must be prohibited by law. In response to an enquiry in Berlin, the German Ministry of Health explained that t…