What requirement is associated with the use of an instrument departure procedure chart?

The requirement associated with the use of an instrument departure procedure chart is that the pilot must have an approved textual description of the procedure. This is crucial because the textual description provides comprehensive details about the specific procedures, altitudes, and routes a pilot must follow when departing from an airport under instrument flight rules. These procedures are designed to ensure safe takeoffs and transitions into the en route phase, often including instructions that may not be fully depicted on the chart itself.

Having the textual description allows pilots to reference critical operational details that could affect their flight, such as obstacles in the area, communication frequencies, and specific waypoints. Therefore, it emphasizes the importance of understanding both the graphical and textual components of the procedure to conduct a safe and compliant departure.