Which directive type is reviewed every 4 years by originators and remains in effect until canceled?

• A. Notices
• B. Manuals
• C. SOP
• D. Instructions

Answer: (D)

Directives that carry procedures and responsibilities with a stable, ongoing baseline are designed to be maintained by the originator on a four-year review cycle and stay in effect until someone cancels them. This is the type that fits: Instructions. The originator is responsible for reviewing the content every four years to ensure it still applies and is accurate; if no changes are needed, it remains in effect, and only cancellation or formal revision ends it.

Notices are typically for time-sensitive information and can be canceled or superseded more readily. Manuals cover broader reference material and may follow different update rhythms. SOPs are often local to a unit and updated as procedures evolve, not tied to a strict four-year cadence. Understanding this helps you gauge how stable a directive is and when to expect updates.