Who decided this?

Why is it that @Amtrak @AmtrackNEC required my 15-year-old cousin to be registered as an unaccompanied minor when airlines allow people much younger traveling alone not to be? Luckily, we had walked him to the train and were there to fill out the form. Otherwise, he would have missed his train.

Here are the rules and regulations and instructions for filing out the form.  A lawyer's dream!

And here is the form itself.  Among other things, you need to certify that the passenger "does not have any life-threatening food allergy, such as an allergy to peanuts or peanut products."