Civil procedure; testimony of experts; effective date.

HB 2628 amends Oklahoma's civil procedure law to set clearer standards for expert testimony in court. It requires the party introducing an expert (the "proponent") to prove to the court that the testimony is based on sufficient facts, uses reliable methods, and was properly applied to the case. This affects parties in civil lawsuits relying on expert witnesses, such as in medical malpractice or personal injury cases. The bill takes effect November 1, 2025.