There is no universal "national park permit" in Nepal — every protected area sets its own rules under the National Parks and Wildlife Conservation Act, and enforcement is strict because these zones protect endangered wildlife, fragile ecosystems, and cultural heritage. A permit that works for Chitwan doesn't transfer to Sagarmatha or Bardia, and each has different fee tiers, seasonal restrictions, and drone rules layered on top. For crews working against a shoot window, getting this wrong doesn't just risk a fine — it risks losing park access entirely.