New prices will be applicable now. In other words, whatever is the prevailing price at the time of delivery will be final price so, if there is an increase , the customer pays the difference.
On first day there were some buyers [ mostly investors] they paid in full and most of them will get delivery in September and these are the first 200 units I believe, they get the same introductory price. Anyone on partial 1.5Million booking will be paying the new price.
You will see dozens and dozens of Tucson for sale in September with asking price over 6 Million and obviously a premium and inside under the table trading by dealers