Okla. Stat. tit. 63, § 63-2-429: Comparative responsibility - Burden and standard of

proof.

A. An action by an individual drug user is governed by the

principles of comparative responsibility. Comparative

responsibility attributed to the plaintiff does not bar recovery but

diminishes the award of compensatory damages proportionally,

according to the measure of responsibility attributed to the

plaintiff.

B. The burden of proving the comparative responsibility of the

plaintiff is on the defendant, which shall be shown by clear and

convincing evidence.

C. Comparative responsibility shall not be attributed to a

plaintiff who is not an individual drug user.