This document provides guidance on professional ethics standards for accountants in public practice. It discusses potential threats to compliance with fundamental ethical principles, such as self-interest, self-review, advocacy, familiarity, and intimidation. It provides examples of circumstances that may create these threats and recommends safeguards to address threats, including procedures at the firm level and for specific engagements. The document also provides guidance on professional appointments, client acceptance, engagement acceptance, and changes in professional appointments.