It can be either way. If you find that it's on the inside you're probably working with the needle tips away from you and the tube closer to you. You can flip the knitting through the circle inside out then rotate the circle around so the working needles would be closer to you. Like the rim of a glass where you'd take a sip from. Many people work with the RS on the inside though, then flip the knitting through at the end.
sue- knitting heretic