Does a person have to be licensed to apply tatoos on people when they charge them for their services, and do they get training to learn how to give tatoos?

http://www.bodymetals.be/studio/ste-vrta.html

http://www.nyc.gov/html/doh/html/ehs/tattoo.html

I am sure that this certification is for people other areas also.

http://search-info.com/search/engine/index/Arts/Bodyart/Licensing_and_Regulations/

Thanks for the links, Sherasi. There's a lot of info.