What do third-level subdivisions apply to?

Third-level subdivisions are designed to provide further detail and organization specifically within the context of their parent second-level subdivisions. This hierarchical structure allows for a clearer categorization of information, ensuring that the third-level subdivision is relevant and directly related to the content and meaning of the second-level subdivision it resides within.

By applying only within the scope of the second-level subdivision, third-level subdivisions enable a more focused approach to organizing materials, making it easier for readers to navigate and understand complex topics. As a result, this structure maintains a logical flow and ensures that the hierarchy remains intact. Therefore, the choice emphasizing its application strictly within the context of the second-level subdivision is accurate.