House Bill No. 450 proposes the enactment of Code of Evidence Article 306.1, which addresses the presumption of causation in personal injury claims. The bill stipulates that individuals making claims for damages cannot rely on certain presumptions to prove causation, specifically that they were in good health prior to the incident, that their condition arose and persisted after the incident, or that there is a reasonable possibility of a causal connection between the act and their condition. Furthermore, the bill mandates that claimants must prove every element of their claim, including causation, without the aid of these presumptions. Notably, the provisions of this article do not apply to claims under the Louisiana Workers' Compensation Law.

Additionally, the bill aims to overrule the precedent set by the case Housley v. Cerise, 579 So. 2d 973 (La. 1991), and specifies that its provisions will only apply prospectively, meaning they will not affect causes of action that arose before the bill's effective date. The bill will take effect upon the governor's signature or after the designated time for gubernatorial action if not signed.