Which part of the COLREGs does NOT cover any rules about conduct?

Part D of the COLREGs pertains to "Exemptions" and does not contain specific rules about conduct relating to the navigation and operation of vessels. This section outlines the conditions under which prescribed rules may not apply, especially for specific categories of vessels or situations, thereby making it fundamentally different from the other parts.

In contrast, Part A sets forth general provisions for the entire set of rules, while Part C details the conduct of vessels in restricted visibility and other navigation scenarios. Part E focuses on the conduct of vessels engaged in fishing. Each of these parts directly addresses specific rules or conduct that vessels must follow to prevent collisions, making them essential for understanding safe maritime operation.