NRS453A.310. Affirmative defenses.

      1.  Except as otherwise provided in this section and NRS 453A.300, it is an affirmative defense to a criminal charge of possession, delivery or production of marijuana, or any other criminal offense in which possession, delivery or production of marijuana is an element, that the person charged with the offense:

      (a) Is a person who:

             (1) Has been diagnosed with a chronic or debilitating medical condition within the 12-month period preceding his or her arrest and has been advised by his or her attending physician that the medical use of marijuana may mitigate the symptoms or effects of that chronic or debilitating medical condition;

             (2) Is engaged in the medical use of marijuana; and

             (3) Possesses, delivers or produces marijuana only in the amount described in paragraph (b) of subsection 3 of NRS 453A.200 or in excess of that amount if the person proves by a preponderance of the evidence that the greater amount is medically necessary as determined by the person’s attending physician to mitigate the symptoms or effects of the person’s chronic or debilitating medical condition; or

      (b) Is a person who:

             (1) Is assisting a person described in paragraph (a) in the medical use of marijuana; and

             (2) Possesses, delivers or produces marijuana only in the amount described in paragraph (b) of subsection 3 of NRS 453A.200 or in excess of that amount if the person proves by a preponderance of the evidence that the greater amount is medically necessary as determined by the assisted person’s attending physician to mitigate the symptoms or effects of the assisted person’s chronic or debilitating medical condition.

      2.  A person need not hold a registry identification card issued to the person by the Division or its designee pursuant to NRS 453A.220 or 453A.250 to assert an affirmative defense described in this section.

      3.  Except as otherwise provided in this section and in addition to the affirmative defense described in subsection 1, a person engaged or assisting in the medical use of marijuana who is charged with a crime pertaining to the medical use of marijuana is not precluded from:

      (a) Asserting a defense of medical necessity; or

      (b) Presenting evidence supporting the necessity of marijuana for treatment of a specific disease or medical condition,

Ê if the amount of marijuana at issue is not greater than the amount described in paragraph (b) of subsection 3 of NRS 453A.200 and the person has taken steps to comply substantially with the provisions of this chapter.

      4.  A defendant who intends to offer an affirmative defense described in this section shall, not less than 5 days before trial or at such other time as the court directs, file and serve upon the prosecuting attorney a written notice of the defendant’s intent to claim the affirmative defense. The written notice must:

      (a) State specifically why the defendant believes he or she is entitled to assert the affirmative defense; and

      (b) Set forth the factual basis for the affirmative defense.

Ê A defendant who fails to provide notice of his or her intent to claim an affirmative defense as required pursuant to this subsection may not assert the affirmative defense at trial unless the court, for good cause shown, orders otherwise.

      (Added to NRS by 2001, 3061; A 2009, 624)