If there is one habit to carry out of this book, it is this: verify against the current rule, not the one you remember. Part 107 is not static, and the corpus you have been learning from carries the proof inside it. Take night operations. Under § 107.29 a certificated pilot may now fly at night after completing the knowledge test or training required after April 6, 2021, and the old case-by-case night waivers issued under the earlier regime terminated May 17, 2021. That is a rule that changed within the lifetime of Part 107 — the way you fly at night today is not the way it worked before 2021, and a pilot running on the old understanding would simply be wrong.

Remote ID tells the same story on a larger scale. Under § 89.105, Remote ID became a condition of nearly every flight after September 16, 2023 — a requirement that did not exist for most of Part 107’s history and now shapes how every compliant drone operates. Put the two examples together and the lesson is plain: the rules move. Someone who learned the pre-2021 night regime, or who flew before Remote ID and never updated, would today be operating against rules that no longer apply. Currency of knowledge, not just currency of your certificate, is part of the job.

The practical discipline follows directly — treat any rule you are relying on as something to confirm against the current official text, especially the parts that carry weight: a number, a date, a threshold. That is also the promise behind this book. It is built to stay current with its official sources, so that when a rule changes the book changes with it rather than going stale on a shelf. The regulation is always the authority; this book is a plain-English guide that tracks it. Read it, rely on it — and when the stakes are high, check the specific rule against the current source, which is the very source this book is built on.