It’s advisable to engage an agent for assistance due to inadequate communication with authorities. While overfly permits are unnecessary, it’s crucial to confirm Navigation Fees beforehand.
For tech stops and private flights (although not advised), stays under 72 hours typically don’t require a permit.
Acquiring landing permits is notoriously challenging in aviation. It’s imperative to enlist an agent, as the process can span several months. Anticipate costs exceeding $5000, including notarization of original documents, and be prepared for potential delays, as permits may not be obtained by the intended flight date. The difficulty level is indeed significant.