Chief, I respect and appreciate your vast knowledge, but you're a little off on this one.
CBD, has no THC ( the active drug shunned in marijuana ) in it if it is true CBD. In the republic of California, CBD if sold in a reputable store, has no THC ( the active "high" producing drug) in it.
If bought from a California legal dispensary that sells marijuana products any CBD product will by law have THC in some quantity. Therefore if you use the products from a dispensary you will most likely test positive on a drug screen. I'm not advising either way but have used CBD products rather than prescription opioids for medical reasons and have passed DOT testings.
Drug dog usage has been greatly reduced since the relaxation of marijuana rules as a dog doesn't know between a gram, or a pound, so enforcement has become a problem. Again... true CBD doesn't have THC in it but has been pointed out, is still "illegal"on most ships. Look for the leftover cream bottles at the pickleball courts.