An interesting question. I'd suspect almost certainly. But a better source is perhaps Appendix J of the Standard Terms of Agreement.
Actually the STOA does cover it better as far as Optus is concerned. Do a search for 'Satelite' in that document and you'll find the word 'Excluding' almost always very close by.
Appendix J seems to be the place to find the cost (which seems between $1 and $7 ish? per 30 second block)
So keep it short!