How should the code name "FLYNET" be forwarded in a flight plan?

When forwarding the code name "FLYNET" in a flight plan, it is important to include it as an element in the remarks section. This practice is essential because the remarks section is specifically designated for additional information that may be relevant to the flight but does not fit into the standard categories. Including "FLYNET" in this section ensures that it is clearly communicated to air traffic control and any relevant personnel, allowing for proper context without disrupting the structured format of the flight plan. This practice helps maintain clarity and ensures that critical information is conveyed appropriately.

The other options suggest methods of reporting that do not align with established procedures. For example, treating it as a priority item could lead to misunderstanding about the urgency of the information, while stating it apart from other information might not provide the necessary context. Reporting it only on command would compromise prompt communication that is vital for flight safety and operational efficiency. Therefore, the remarks section is indeed the most suitable and effective place for the code name.