What must be accomplished before issuing control instructions to an aircraft not in your airspace?

To issue control instructions to an aircraft that is not within your airspace, it is essential to ensure coordination with all affected controllers. This step is vital because it fosters communication and collaboration among air traffic controllers managing different segments of airspace. Coordination allows for the seamless transfer of information regarding the aircraft's current status and intentions, thereby ensuring safety and efficiency in managing air traffic. When control instructions are issued without proper coordination, it can lead to conflicts or misunderstandings that could jeopardize the safety of the aircraft.

While confirming fuel status, filing a flight plan, and checking weather conditions are all important aspects of flight operations, they are not the primary prerequisite for issuing control instructions in the context of airspace management. Coordination is specifically focused on the roles and responsibilities of air traffic controllers and is essential to maintain order in the airspace system.