Final answer:
The modification of ATC airspace responsibility typically requires approval from the National Operations Manager or an equivalent senior official within the air traffic control organization.
Step-by-step explanation:
The modification of ATC airspace responsibility is a significant procedural change that must be managed carefully to ensure air traffic safety and efficiency. According to regulations and standard operating procedures, such an administrative change generally requires the involvement and approval of a higher authority within the air traffic control organization. While the specific titles can vary by country and organization, the National Operations Manager or equivalent senior official often has the requisite authority to approve changes to ATC airspace responsibility. This ensures that changes are made with a full understanding of their impact on national air traffic operations.