Trying to understand Subsidies in a apartment building

[Ray Valdez]

I need understanding on subsidies in an apartment building in NYC. If I buy this apartment building that have subsidized apartments I am aware I can’t bring the rent up. But the question is once the tenant has left the apartment does the apartment stay with a subsidy or I can move forward in raising rent? I am seeing a lot of deals with some serious month net︃ profit but most have subsidized apartments.