[longtermmemmory]

it is ALREADY grounds to revoke a license and where actual impairment is at issue physicians are OBLIGATED to report the impairment. it is the law NOW.

So if a physician considers the use an impairment then that person MUST be reported. period.

anyone who is perscribed pot is INELIGIBLE to hold or maintain a cdl. it is the law.

use pot you can’t drive commercially (or even off duty),

use pot and a your regular non pothead doctor may have the affirmative duty to report your use of pot as an impairment to safety.

read.

[JustSayNoToNannies]

That doesn't add up to your proposal that "any perscription [sic] should have an instantaneous medical suspension of all vehicle licenses." But you knew that, or you wouldn't have said "should." So you're still not making a coherent point.