For the first time in more than 30 years, the Perth Amboy city council voted last week to slow down the rate of rent increases for tenants. In previous years, Perth Amboy landlords could raise rents by 5% annually under the city’s rent control rules. But under a new ordinance approved last week, tenants will only see a maximum increase of 3% at the end of their lease — or a maximum of a 2.5% hike if they also pay their unit’s water bill. The new rules apply to buildings with four or more units. “At the end of the day it’s a home-run for everyone,” said Joel Pabon, a Perth Amboy city council me…