Bedroom Door Knob Locks in Philadelphia (Fire Hazard?)

[Colin C.]

Hey everyone. For those in Philadelphia... I was told here and there that renting out a SFH that has keyed entry bedroom door knobs (standard single cylinder and turn-button on the other side) is a fire hazard and against some kind of code or, if not, makes you liable for fire hazard dangers. Is this true? I can't find anything that tells me definitively either way... Any help is greatly appreciated. Thanks.