This report examines ethical requirements within management accounting, specifically focusing on the Australian Professional and Ethical Standards (APES) 110. The analysis involves several case studies illustrating breaches of professional conduct, integrity, objectivity, and confidentiality. The report identifies instances where auditors and accountants failed to meet the required standards, resulting in violations of APES 110. The report also classifies various audit opinions, including disclaimer, qualified, adverse, and unqualified opinions, based on specific scenarios. The cases highlight the importance of adherence to ethical guidelines, transparency, and maintaining professional competence within the accounting and auditing fields. The report emphasizes the need for auditors to express their opinions at the end of each audit exercise, ensuring integrity in the field. The report also references key literature related to accounting ethics and auditing practices.