@ssendood thank you po, just to update - I filed through an agent po so I also had a meeting with my agent last weekend.
She mentioned that the Medicate needs to be applied <b class="Bold">7 days after arrival to AU</b>.
- Not sure why there's a specific 7 day period that needs to lapse
What interested me though is that the card will be posted to your address in AU so its better to apply for it in the state you're planning a BM on. π
Also, I applied my 189 visa as a "single" individual, so I'm not supposed to get married until after I activate my visa (make my entry to AU).