Forum:Anbu tatoos?

I was reading the article on ANBU, and it said that they always have the tattoos to signify that they are ANBU. But looking at Zabuza, I noticed that he doesn't have the tattoo on his left shoulder that it says ANBU have. Is it possible that the tattoo is just for Konoha ninja, or was it confirmed by a databook that all ANBU have it?--Darth Nex (talk) 10:52, 1 July 2009 (UTC)