RE:RE:RE:News From the House of Commons.
beside BLO, the only publicly traded cie for a way of testingcannabis recent consuption in a 'road side' kinda way is LCTC lifeloc technologies but I don't think they have a working prototype.
https://www.laboratoryequipment.com/article/2017/02/roadside-marijuana-breathalyzer-can-detect-high-driving
Houd labs looks good, they should be up for the next round of investment (you must obviously be a qualified investor) you can sign up here to get the info and get notified for the next investment opportunity:
https://houndlabs.com/contact-us/