Civil liberty advocates celebrated a major victory on Thursday after the U.S. Supreme Court ruled it unconstitutional for law enforcement officers to perform forced blood tests without a warrant on individuals suspected of a DUI, The Free Thought Project reports.

In Washington, this decision should lead to the overturning of that state’s DUI laws regarding cannabis because, currently, the only official method of testing a driver for THC-impairment is via blood test.

After the 2012 passing of Washington’s I-502, which legalized recreational cannabis, the state also established new DUI laws: in post-legalization Washington, drivers are not allowed to have more than 5 nanograms of active THC per milliliter of blood. For regular cannabis consumers, that is an absurdly low limit that essentially negates a regular consumer’s ability to legally drive themselves anywhere.

However, with forced blood tests now declared unconstitutional on a national level, Washington officials must seek a new way of checking drivers for THC impairment.

The Supreme Court decision ultimately ruled that breathalyzers do not require warrants but blood tests do because they are significantly more invasive: they both pierce the skin and leave behind a biological sample in the government’s possession.

Based in Portland, Oregon, Graham is Ganjapreneur's Chief Editor. He has been writing about the legalization landscape since 2012 and has been contributing to Ganjapreneur since our official launch in...