What primary legal framework governs the professional conduct of lawyers in California?

The primary legal framework that governs the professional conduct of lawyers in California is the California Rules of Professional Conduct. These rules are specifically designed to address the ethical obligations and standards for attorneys practicing within the state.

While the ABA Model Rules provide a foundational set of ethical guidelines that many states consider or adopt in some form, California has its own tailored version of professional conduct rules that reflect the unique legal and social landscape of the state. The California Rules of Professional Conduct are promulgated by the State Bar of California and must be adhered to by all practicing attorneys.

The inclusion of the ABA Model Rules is relevant as they serve as a reference point for some aspects of legal ethics, but they are not the governing rules in California. Instead, California's specific rules must be followed. Hence, the correct answer focuses solely on the California Rules of Professional Conduct, as it represents the unequivocal framework that directly regulates attorneys in California.

This context emphasizes that while the ABA Model Rules may inform practices and ethical considerations, the California Rules of Professional Conduct stand as the primary source of authority for attorneys practicing in the state.