So what does this actually require?

Dave and I saw this sign on a salon wall and we literally stopped and stared at it. I thought I was just misreading it and I had to go back to it twice just to make sure that I was reading it right.

Yes, you're reading it right. It's a hair blessing.

Now what does this actually require? Is it the mandatory Catholic priest or can any religious leader perform this? Would the religious leader have to be trained in hair care? My imagination is presenting me with an image of The Exorcist and a campy priest doing the "blessing"