9.03.020 Unlawful possession of controlled or counterfeit substances or legend drug.
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It is unlawful for any person to knowingly possess a controlled or counterfeit substance, or legend drug, unless the substance was obtained directly from, or pursuant to, a valid prescription or order of a practitioner while acting in the course of his or her professional practice or as otherwise authorized by this chapter, state or federal law. The existence of a valid prescription is an affirmative defense, provable by a preponderance of the evidence.