They can piercer those over the age of 14 usually with parental consent, showing ID's of both the minor and the gaurdian, and the parent being present
I'm not sure what their policy for a nose piercing on a minor would be, however, if you call and ask I'm sure they will be able to answer your question. It really will depend on the age of the minor. In the state of Utah, minors of a certain age can get piercings with adult consent
I'm not sure about a septum piercing but I know that my son got his ears pierced and he is almost seventeen. I had to sign for him and he had to show a form of ID in order to get them pierced.
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