Last week saw the 2018 FAA Reauthorization Act become law, and the new legislation has quite a few implications for people who fly small drones or model aircraft as a hobby. Before diving into the latest changes, it's worth reviewing how the U.S. Federal Aviation Administration has regulated such things in the past. Way back in 1981, the FAA issued an "Advisory Circular" that provided guidance for people flying model aircraft. Most modelers considered those guidelines reasonable enough, but if you didn't conform to them, it was no big deal--they weren't rules, just recommendations. So, for example, if you flew a model sailplane and caught a thermal that took it more than 400 feet off the ground, the FAA really couldn't object that you were in violation of its advice to keep lower.