Which requires that changes be approved by the members of the AICPA?

The correct answer highlights that the principles and rules of the AICPA require approval from its members. The AICPA operates under a structured framework where certain foundational principles establish the ethical guidelines for CPAs. These principles are broad concepts that lay the groundwork for more specific rules, which provide detailed guidance on ethical behavior and practices for members.

The necessity for member approval before any changes to these principles and rules is vital because it ensures that the standards set reflect the collective ethical commitments and interests of the membership. This democratic approach helps to maintain trust and credibility within the profession, ensuring that all members feel represented and that the guidelines they adhere to are aligned with their values and the expectations of the profession.

In contrast, interpretations of the rules, while important for clarifying how the rules apply in various situations, are typically issued by designated bodies or committees within the AICPA and do not require the same level of member approval for changes. Additionally, standards and guidelines, while also significant in the context of professional practice, do not intrinsically fall under the same approval process as the core principles and rules do. Thus, the focus on approval aligns specifically with principles and rules, reinforcing the compliance and integrity of the ethical framework guiding CPAs.