Notices address a particular problem that has arisen and typically have an expiration date (usually 1 year).

• A. Notices provide general policy guidance with no expiration
• B. Notices address broad regulatory principles with no expiration
• C. Notices are used to set permanent standards
• D. Notices address a particular problem that has arisen and have an expiration date (usually 1 year)

Answer: (D)

Notices are used to address a specific issue that has been observed in practice, and they’re meant to be short-term guidance. They carry an expiration date so the agency can review and update or discontinue the guidance as new information becomes available. This time-limited nature helps respond to a current problem without locking in permanent rules.

This is why notices are distinct from general policy guidance or broad regulatory principles, which are intended to be stable and long-lasting, and from permanent standards, which establish ongoing requirements. For a concrete example, a notice might address a particular equipment-related contamination risk that emerges in a subset of facilities and require a temporary procedure changes, with a plan to re-evaluate after about a year.