11 Sep State dinner in Singapore : most likely black tie (as it was during the Queen´s visit in 2006), but possibly a tiara event for the Duchess.
13 Sep Official dinner hosted by the King of Malaysia : probably not white tie, as it is only labelled as an official dinner. On the other hand, this is in Malaysia, with lots of royals eager to meet the couple. I am certain we will at least see some grand jewels (a necklace perhaps).
16 Sep State dinner in the Solomon Islands : most likely black tie with tiara (the dress code often observed in Australia)
18 Sep Traditional dinner in Tuvalu : most likely not a tiara event.