I am doing the Monaco HIM on 2nd Sept and the website info states that you need to



OR buy a one day licence which requires a signed medical certificate saying I'm fit.

I have joined Triathlon Australia and have a card from them - I'm assuming that is a "licence"

Is that what others who have raced overseas have used? Or should I get the medical certificate before I go just in case.

Your TA License should be all that is required. Send an email or phone the race organisers to check. That way you will know for sure.