This from the AP:

Mexico decriminalized small amounts of marijuana, cocaine and heroin on Friday — a move that prosecutors say makes sense even in the midst of the government’s grueling battle against drug traffickers.

Prosecutors said the new law sets clear limits that keep Mexico’s corruption-prone police from extorting casual users and offers addicts free treatment to keep growing domestic drug use in check.

"This is not legalization, this is regulating the issue and giving citizens greater legal certainty," said Bernardo Espino del Castillo of the attorney general’s office.

The new law sets out maximum "personal use" amounts for drugs, also including LSD and methamphetamine. People detained with those quantities no longer face criminal prosecution.

It will be interesting to see what effect this has on Mexico if any.