Explanatory material is included in informational notes and is enforceable as requirements.

• A. True
• B. Sometimes
• C. False
• D. Not specified

Answer: (C)

Explanatory notes are there to clarify and provide context for a requirement, not to create new obligations. The enforceable parts of a standard are the operative language that states what must be done (often using terms like shall or must). Informational notes are meant to guide understanding, give examples, or explain rationale, but they do not, by themselves, impose requirements. Only if a regulatory authority explicitly adopts or references a note as a requirement would it become enforceable, which is not the usual case. Therefore, the statement that explanatory material in informational notes is enforceable as requirements is not generally true.