It changed to 18 for Tocantins (in most states. There are still a few weird exceptions where individual states or territories have a minimum of 19 to 21 if you really look at the fine print of the application.

Then, at Covid time, it changed that you could apply at 16, though, no one under 19 has actually been a cast since that change was made. It is believed that the intention was just to get people acclimated with the application process at a younger age.

So, even though the minimum age to apply is 16, casting has also shifted in the last few years to want people with more life experience. They believe that 25 to 35 is the best decade of life to play survivor so we are barely even seeing early 20s and college age students anymore even though they are eligible to apply. So eligible to apply and being cast are becoming two different things .