DAO 2013-24 is a regulation addressing which substances?

• A. Regulation governing lead and lead compounds.
• B. DAO 2013-24.
• C. Regulation governing PCB labeling.
• D. Regulation on pesticides.

Answer: (B)

Regulations are identified by a specific code, and that code is the precise indicator of its scope. When a question asks what substances a regulation with a given code addresses, the safest, most accurate choice is the regulation itself, because the code defines the document you’re referencing. The other options describe topics that would be covered by separate regulations with their own codes (for example, lead compounds, PCB labeling, or pesticides each have their own regulatory provisions). So the correct pick is the regulation identified by that code, since that is exactly what the code designates.