hailand’s move to reclassify cannabis as a narcotic threatens to trigger street protests and class-action suits by owners of thousands of dispensaries which sprung across the country in the wake of decriminalization two years ago.

A complete re-criminalization ordered by Prime Minister Srettha Thavisin on Wednesday will also push the cannabis trade underground, said Rattapon Sanrak, owner of Bangkok-based dispensary Highland Cafe. Writing Thailand’s Cannabis Future, an advocacy group, said it will hold a protest against the move in Bangkok on May 16.