Louisiana Codes > Code of Evidence > Chapter 7 Louisiana Codes > Code of Evidence > Chapter 7 – Opinions and Expert Testimony Current as of: 2023 | Check for updates | Other versions § 701 Opinion testimony by lay witnesses § 702 Testimony by experts § 703 Bases of opinion testimony by experts § 704 Opinion on ultimate issue § 705 Disclosure of facts or data underlying expert opinion; foundation § 706 Court appointed experts