Can National Park Service rangers have piereced noses?

I would like to get my nosed pierced, but I will be working for the National Park Service this summer. I will be wearing the official service uniform and interacting with the public on a daily basis. I don’t want to pierce my nose now just to have to take it out in a month. I just want to get a little stud. Does this violate the NPS dress code?
Is that “yes”, rangers can have their noses pierced or “yes” it violates the dress code?

Look at it this way, Park Rangers look profesional. Someone with a pierced nose looks like an idiot. .