Nostalrius Begins - Quality wow vanilla realm (1.12)

My question is referring directly to playing two accounts at once. Now obviously using any 3rd party software/ exploiting any profs is a no go. Also using a higher level and just abusing a /follow to level is a violation. I was wondering if this applies to leveling two toons at the same level and playing a warr/priest where you are just tabbing between the two instances of the game? I know just following around and carrying is an issue but if you're kind of legitimately making decisions on multiple chars, I was wondering if that's a ban worthy offense.

Thank you in advance.

Multiboxing is not allowed

As far as I can tell, that's considered multiboxing and is not allowed. The only case where playing on two characters and tabbing between them is allowed is for banking or enchanting purposes at a capital city. Any other cases, whether lazily carrying an alt on /follow or skillfully playing both characters through tabbing, are forbidden.