A bill setting 15 nanograms as the THC threshold for DUI-marijuana is awaiting the governor’s signature. Governor Rauner has 60 days to decide whether to sign it or veto it.
Under the current law, a driver caught with any amount of marijuana in his system is considered legally impaired. Opponents believe the current law is unfair because THC stays in a person’s system for weeks without causing impairment, a fact even the federal government acknowledges. The proposed bill sets a legal amount of THC in the system to account for the drug’s lingering effects and allows police to conduct roadside saliva tests to determine whether the driver is over the 15-nanogram limit.