I've been asked to ensure “exhaustive subsectioning”, what does this mean?

The Generic Style Rules recommend that sectioning is done “exhaustively”. This means that any chapter or section that has a section on the next level needs to have at least two on this level. For example, a Section 2.2. would be in violation of this rule if it had just one Subsection 2.2.1.

There are three basic strategies to resolve these issues:

1. Add another subsection before or after the only child on the same level.
2. Promote the subsection by one level. In the example above, Section 2.2.1 would become the new Section 2.3.
3. Remove the section heading of the only child and integrate the text belonging to it to the upper level.