I have a quesstion for you? do you have to be invtied into a tribe in order to wear garb when dancing at a pow?

i have a quesstion for you? do you have to be invtied into a tribe in order to wear garb when dancing at a pow wow? I was told that I had be invited and can't just make garb and wear in a pow wow, I had to be first invited and then i was allowed to dance in garb after afterwards .