The principle of the IIA Code of Ethics that focuses on continuing education and professional development is Competency. This principle emphasizes the need for internal auditors to maintain their skills and knowledge at a level required to perform their duties competently. Continuing education and professional development are essential to achieving this.
IIA Code of Ethics.

When an internal audit activity lacks the necessary skills to perform a requested consulting engagement, the most appropriate action according to IIA guidance is for the Chief Audit Executive (CAE) to decline the engagement request. This decision ensures the integrity and quality of the audit service, adhering to the standard of only undertaking work where the internal audit staff possesses or has the ability to obtain the necessary knowledge and skills.References: The Institute of Internal Auditors (IIA) - International Standards for the Professional Practice of Internal Auditing.

Before undertaking an assessment of the quality assurance and improvement program, it is necessary to establish external assessment resources. This includes determining who will conduct the external assessment, the methodology to be used, and other logistical considerations to ensure that the assessment is thorough and conforms to the IIA's standards for quality assurance.References: The Institute of Internal Auditors (IIA) - International Standards for the Professional Practice of Internal Auditing, specifically those related to quality assurance and improvement.

Control activities are specific actions defined by management aimed at mitigating risk to the achievement of objectives. They are part of the broader internal control framework, which management designs according to the organization's risk management strategies. These activities can vary widely across different organizations depending on the specific risks they face and the strategies management employs to mitigate these risks.References: COSO Framework on Internal Controls