Most shops that perform body peircings have a license with a reputable agency. It is this agency that sets the standards for age minimums without parental consent. Thus, while in some parts of Indiana you may be able to get your belly button peirced at age 14 all on your own, there will be other shops that will not allow it until you are as old as 18. Be wary of a shop that will accept anyone younger than 16-- this speaks to the integrity of their agency, and thus to your chances of having the procedure performed incorrectly, and facing painful complications.