On the pace of decriminalization, the report warns:
Proceeding on the precautionary principle -- that is, bringing in any new regulatory regimes in an incremental, cautious way -- represents the most constructive and responsible way of developing such regimes. Such an approach both ensures that each regulatory step can be carefully assessed, (and reviewed if unintended negative outcomes emerge), and allows individual countries and/or regions to fine-tune their approach according to local economic, cultural and behavioural norms.
A five-point spectrum is provided for how various substances might be regulated, ranging from perscriptions to unlicensed sales. The authors specifically highlight marijuana as the most likely candidate for decriminalization, in light of recent developments towards decriminalization.