AZ SB1312

Adds new section 12-2203 to Arizona Revised Statutes establishing standards for admitting expert opinion testimony in civil actions.

Requires expert witnesses to be qualified based on knowledge, skill, experience, training, or education on the subject matter.

Sets five conditions for admissibility: expert qualifications, relevance to the case, sufficient factual basis, reliable principles and methods, and reliable application to the facts.

Directs courts to consider five additional factors when evaluating admissibility, including testability of the opinion, peer review publications, error rates, scientific community acceptance, and whether the expert applied standard scientific rigor used outside litigation.