Barring evidence of distribution or an admission otherwise, I wonder how they could ever prosecute someone for greater quantities. Suppose you're found with 100 tabs of Oxycodone. For a casual user, that might be a 3 month supply. For someone else, it may barely cover 10 days. This remains true for other drugs. I knew someone who used to take LSD every morning just so they could take a shit. I don't know what a 10-day supply looked like for them and that's pretty much my point, how will law enforcement know either?

They set actual limits, the 10 days was just a guideline they used to arrive at those numbers. Source: http://www.spiegel.de/international/europe/evaluating-drug-d...

Yes, from the article:

> 10-day supply of an illicit drug — a gram of heroin

I'm a heroin addict, and that would keep me going for about a day and a half ;(