Mexico's Supreme Court on Monday outlawed the use of recreational marijuana for adults, declaring its prohibition under the health law unconstitutional, after a legalization bill stalled in Congress.
"Today is a historic day for independence," said court president Arturo Zaldivar after eight of the 11 judges approved the decision.
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The decision came after Congress failed to implement a law legalizing recreational marijuana use by the April 30 deadline set by the nation's Supreme Court.
The landmark bill was approved by the lower house in March, but still requires final approval by the upper house, the Senate.
In April, the ruling majority in the Senate said it was considering postponing the final discussion of the legislation until September.
The legalization push is partly aimed at curbing drug-related violence that claims thousands of lives each year in the Latin American nation.