Staying current under Part 107 means completing recurrent training within every 24 calendar months — the remote pilot certificate itself never expires, but your authority to fly on it lapses the moment you fall out of that window. Section 107.65 states it as a bar on exercising privileges: a person may not act as a remote pilot in command unless, within the previous 24 calendar months, they have done one of three things — passed the initial aeronautical knowledge test, completed recurrent training covering the § 107.73 areas of knowledge, or, as a Part 61 pilot, completed the § 107.74 training. After your first certificate, the recurring obligation is that recurrent training.

The phrase “calendar months” is doing real work, and it pays to read it literally. A calendar month is a whole, named month on the calendar — so “24 calendar months” is counted in whole months, not measured to an exact date. In practice your currency runs through the end of the calendar month rather than to the anniversary of the day you qualified: complete recurrent training on any day in March, and you remain current through the end of March two years later. The reckoning rounds slightly in your favor, but the safe habit is to track the month you are due and renew before it closes, not to count to a precise day.

What the recurrent training covers is not new material but the same ground as the test. On the standard path it revisits the § 107.73 areas of knowledge — the full thirteen from the last section, refreshed — which is why those areas matter twice over: once to earn the certificate, and again every two years to keep it. The panel gathers the numbers that govern this cycle in one place.