Author here. Originally I had a lot of blather in that section, but given:

1. It's a long post 2. Most of my readers are presumably >15 yrs old 3. I honestly think most people up to age 15 have limited control over their lives

I decided to trim it down. Obviously I am not literally saying that a 14-and-11-months year old has no influence over their destiny but a 15 year old does. But superfluous precision is the enemy of effective writing; you end up with a legal document.