Does the does the grandfather clause apply to smoking in apartment buildings?

The grandfather clause typically refers to a provision that allows existing entities to continue operating under old rules despite new regulations. In the context of smoking in apartment buildings, it may apply if a building established before new smoking bans was allowed to permit smoking. However, whether or not it applies can depend on local laws and specific lease agreements. It's essential to consult local regulations or legal advice to determine how it applies in a specific situation.