Nepal treats aerial equipment as a security and safety matter, not a formality. Drones fall under aviation law, and CAAN has the authority to seize equipment, fine operators, or halt a production entirely for unauthorized flights — regardless of whether the breach was intentional. Restricted zones around airports, military installations, borders, and heritage sites are strictly enforced, and approvals typically involve more than one government body. For international crews working on a fixed shoot window, that complexity is exactly where delays and denials happen.