After years of opposition from the U.S. government (see my earlier posts here and here), Mexico has decriminalized small-quantity, personal-use drug possession. The Gray Lady reports briefly:

The maximum amount of marijuana considered to be for “personal use” under the new law is 5 grams — the equivalent of about four marijuana cigarettes. Other limits are half a gram of cocaine, 50 milligrams of heroin, 40 milligrams for methamphetamine and 0.015 milligrams of LSD.

President Felipe Calderón waited months before approving the law.