Final answer:
The overreaching principle of ethical conduct in the IMA's ethical standards not identified is 'Opportunity'. The IMA emphasizes 'Responsibility', 'Honesty', 'Fairness', and 'Integrity' as their ethical cornerstones.
Step-by-step explanation:
The Institute of Management Accountants' (IMA) Statement of Professional Ethical Standards does not identify 'Opportunity' as an overreaching principle of ethical conduct. Instead, the IMA’s ethical standards revolve around four main areas: Responsibility, Honesty, Fairness, and Integrity. These principles serve as a guide for management accountants to uphold ethical conduct in their professional roles. Codes of ethics such as these are essential for various professions, ensuring that members adhere to a set of normative rules that support ethical behavior in their field. For instance, similar to the IMA, the IEEE Computer Society has its Software Engineering Code of Ethics which delineates the ethical obligations of software engineers.