That either means that you can't learn to fly until you are 16, or pass your exam until you are 16. I had always thought that the FAA age for passing your PPL is 17 years old as it is here in the UK (I think). If this is true, then I am not sure as to why this flying school has imposed their own regulations on flying lessons for minors. The only thing I can suggest is to email them and ask for further information. Either way, it isn't expressed particularly well.
As far as I know, you can fly at the age of 10 if you can reach all of the controls comfortably and can afford it, but cannot pass your PPL until the age of 17.
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