As ThatT1Feeling notes, he won't be able to trigger the nomination in the time between your TP year end and your card expiry date, i.e. until after 30 Nov. It usually allows the nomination within a couple of days of card expiry date. If this is done in the first couple of days of Dec, you will get pretty much two more full years of gold, because the new partner card (and therefore the benefits) will not expire until end Nov 2019.