Module 2, Lesson 5 from https://dronepilotgroundschool.com, our online test prep course for commercial drone pilots looking to pass the FAA Aeronautical Knowledge Test for a Remote Pilot Certificate.

In this lesson, we go over the operating limitations of Part 107.

The rule I find most interesting in the Part 107 regulations is the one that lets you fly higher than the 400 ft. AGL ceiling, as long as you're within a 400 ft. radius of a structure like a building or tower.