Yes. Obviously the intent of this legislation is to apply when the victim of the kidnapping is under the age of 16. It would be illogical for it to apply to the accused person, because of course mandatory minimum sentences don't have any applicability under the YCJA.
Interestingly enough, one of the reasons they don't have applicability under the YCJA is because there are very good studies about deterrence of young people, their thought process, and their rehabilitation.
I agree with you that this should be clarified. It wouldn't apply to young people for many of the same reasons I've articulated—the lack of evidence about the applicability here. So, yes, I would agree that should be clarified.