The link to the thread that Ruby posted more or less answers my question. According to what I understood from Cinco's reply, you can enter stow away with the ticket on any L25+ character.

According to the reply he gave on my thread, you cannot use an all access elixir whatsoever to get into an Oktal map.

I have one (hopefully) last question on this topic. When you buy the ticket, does it count as an elixir? Can you use a daily blessing elixir, a bought elixir and a stow away ticket at once?