Which legal duty is NOT part of the Companies Act 2006 for directors?

The correct response highlights that the duty to declare personal assets is not explicitly a requirement under the Companies Act 2006 for directors. The Act outlines various specific duties for directors, such as the duty to promote the success of the company, which requires directors to act in the best interests of the company, considering long-term outcomes. The duty to avoid conflicts of interest is essential as it ensures that directors prioritize the company's interests over personal gains and do not exploit their position for personal advantage. Additionally, the duty to act within powers reinforces that directors must adhere to the legal framework and governing documents of the company while making decisions.

In contrast, while transparency regarding financial interests is important in corporate governance, the Companies Act 2006 does not mandate directors to declare their personal assets as a legal duty during the operation of their roles. Hence, this is why it stands out as the choice that does not align with the legal responsibilities defined by the Act.