Labs are putting liability back onto prescribing doctors
Up until recently, if you had a medical marijuana prescription, the procedure to obtain medical clearance was pretty straight forward.
After obtaining and testing the sample, the lab would contact the person and request proof of any valid prescriptions, once provided the MRO (medical review officer) would issue a clearance letter for that person.
Now Canadian labs will issue a clearance letter with a “safety advisory” warning for any safety-sensitive duties, rather than declaring the person medically fit.
This safety advisory requires the person to get a clearance letter from their prescribing doctor The doctor that prescribed the medical marijuana, is the only person who can issue a clearance letter for that patient, stating they are fit-for-duty.
This takes the liability off the testing lab and puts it back on the prescribing doctor.