Which of the following describes the conditions for using a flight review for a commercial pilot?

A flight review for a commercial pilot is a requirement outlined by aviation regulations that ensures pilots maintain their proficiency and are up to date with current regulations and practices. The correct choice indicates that a flight review must be conducted every 12 months for commercial pilots to keep their flying privileges active. This annual requirement helps to ensure that pilots regularly engage in flight training and assessment, thereby enhancing safety in aviation operations.

The other options, while they may touch on related concepts, do not correctly represent the specific regulatory requirement for flight reviews. Recognizing that this review reinforces both the pilot’s flying abilities and knowledge of regulations emphasizes its importance in a pilot's career.