Your position is more than an "honest opinion".. -- It is the base fact enumerated in the 14th amendment, "-- nor shall any State deprive any person of life, liberty, or property, without due process of law; --".
The 'law' at issue here is an unreasonable and arbitrary infringement on due process, -- in that it claims "the mere trace evidence of a person having once consumed an inebriating substance" --- "is guilty".
Are there any "law makers" out there that have an understanding of the principle of "one being responsible for their own actions"?
A citizen should be judged by their actions not by the cannaboids that might be found in their urine.