Press Release – ACT New Zealand A flood of stories about the likely impacts of new interest deductibility rules has necessitated a new website to hear them all, says ACT Housing spokesperson Brooke van Velden. Labours interest deductibility changes represent a stealth … “A flood of stories about the likely impacts of new interest deductibility rules has necessitated a new website to hear them all,” says ACT Housing spokesperson Brooke van Velden. “Labour’s interest deductibility changes represent a stealth tax on Mum and Dad investors, 80 percent of whom own just one rental. The changes will squeeze the middle class and hurt renters.