Which part addresses the rules regarding delegation of authority?

The correct choice relating to the rules regarding delegation of authority is indeed Part 265. This part specifically outlines the delegation of authority practices within the Federal Deposit Insurance Corporation (FDIC). It establishes the framework for authorizing officials within the organization to act on behalf of the FDIC, ensuring that actions taken are in compliance with established policies and regulatory requirements.

Part 265 covers various aspects concerning the delegation process, including the scope of authority that can be delegated, the necessary documentation, and the responsibilities of those to whom authority is granted. This is crucial for maintaining operational efficiency while ensuring appropriate oversight and accountability within the organization.

In contrast, other parts mentioned do not focus specifically on delegation of authority: for instance, Part 215 deals with transactions involving member banks and their affiliates, Part 220 relates to the regulation of credit by the FDIC, and Part 224 addresses regulatory capital standards. Hence, they do not cover the relevant rules for delegation as comprehensively as Part 265 does.