A fair-housing group filed a lawsuit on Tuesday challenging New York Citys practice of allotting half of its new affordable-housing units to residents of particular communities, a move that could upend Mayor Bill de Blasios affordable-housing plan.

Community preference is being threatened with the filing of a lawsuit by a fair-housing group. According to Jerilyn Perine, Executive Director of the housing research organization Citizens Housing and Planning Council “Community preference was born to make sure that people who were living in not-great conditions, in neighborhoods that were struggling, had an opportunity to take advantage of the improvements that were happening.”

Read more in the WSJ.