Legal flight eligibility depends on airspace class, mission profile, and current FAA rules. In many cases, uncontrolled airspace can be flown without prior authorization if all other operational requirements are met. Near airports and in controlled zones, authorization is often required before takeoff. Always validate airspace in approved planning tools before each mission. If your immediate goal is passing the FAA Part 107 exam, get the FAA 107 Study Guide here: https://faa107studyguide.com.