Jefferies gaming analyst David Katz told investors Tuesday the proposed smoking bans could be detrimental to both Penn National and Boyd Gaming Corp.

Another petition – financed by Penn National Gaming – seeks to keep the exemptions in place. The county also could end up with two dueling smoking bans. Louis County, a ballot measure was certified that would get rid of exemptions for casinos and more than 90 bars allowed under the county’s current seven-year-old smoking ban.