New Jersey officials are cracking down on landlords violating a new state law meant to stop discrimination against formerlly incarcerated people looking for housing.

The state Attorney General’s Office sent seven cease-and-desist letters to housing providers who posted apartment ads that explicitly banned residents with convictions from applying. That practice is now prohibited under New Jersey’s landmark law that limits when landlords can run background checks.

“We are committed to ensuring that every New Jersey resident has a fair chance to find safe and affordable housing,” acting Attorney General Platkin said in a statement. “If you are violating the law, we will seek you out, and we will hold you accountable.”

The three-month-old law is hailed by housing advocates as one of the most sweeping in the nation that eliminates automatic housing rejections for formerly incarcerated people.