Thanks for your response!
He has a PR. Though we plan to get engaged by November/December (the only time he will get to be in India). We haven't lodged our applications as of yet, we plan to latest by October.
Also applying 'Intent to Marry' for a long duration isn't possible in my country as we have to get married within the 3 months of its application. What if we apply NOIM from Australia itself, in the future can we cancel that and get married in India instead?