Section 8 tenant smoking

[John Bergamini]

We just bought a 4 plex. We are renovating 3 of the units currently and now making it a non smoking building. We have 1 tenant that is under contract before we bought it and she smokes heavily inside her unit. Do we have any legal right to tell her that the building is non smoking and her lease will be void if caught or can we only do that if her lease has something in it abut smoking?