It takes 3 business days for you to be added to the register, but it also takes three days for you to be taken off. Therefore as my understanding goes you will be able to sell tomorrow as you would not be removed from the register until three days later (ie. the 19th June).
This is the premise that I based my ANZ share sale on teh day after its recent raising and I have recently recieved my entitlement offer.
AIO Price at posting:
$1.46 Sentiment: Hold Disclosure: Not Held