Special Use Airspace requests must be submitted a maximum of how many business days prior to TD-1?

The submission of Special Use Airspace requests must be made at least 10 business days prior to the planned operation, or TD-1 (Training Day 1). This time frame is established to ensure that the request can be thoroughly reviewed and coordinated with the appropriate authorities, ensuring safety and efficiency in airspace management. The process typically involves checking for conflicts with other airspace users, notifying relevant parties, and making any necessary adjustments to airspace usage. A 10-day lead time provides sufficient time for all stakeholders to analyze the request and facilitate any necessary arrangements. This requirement is in line with aviation best practices that prioritize safety and effective communication among all involved agencies.