If they hold a valid visa then they are able to travel to Australia under the conditions of that visa.
It is advisable to upload a note on their Immi account to let immigration know of their intentions. That way they can inform your partner when they are ready to make a decision and she can then leave the country.
Note - she only needs to be offshore for the decision not necessarily Iran.
The times published on Immi site website are the best guide you will get, it is updated at their whim so depending on when you last checked yes it could have been updated.