Clarification on the rules. Are alts allowed?

[KangahRoh]

The rules kinda confused me. The boxing section reads to me in the obvious way 'Don't log in twice and play' which is fine. But it's also suggestive that you're only allowed one character at once.

Is this so? I'm someone that likes playing both healers and dps and I'm just unsure whether I can roll two characters to play at different times. (One for grouping with friends) and one for soloing alone.

Is this allowed? Obviously I don't plan on opening to instances of eq to play both at the exact same time. I just like having the option to switch between characters both from a gameplay perspective and a rp perspective.