DES MOINES — A June 29 trial is set in a lawsuit filed by bar owners who say Iowa’s smoking ban violates their rights.

The Iowa Bar Owners Coalition filed the lawsuit last July 1, the same day the ban went into effect.

It names the director of the Iowa Department of Public Health, the department and the state of Iowa.

The group argues that the ban, which prohibits smoking in nearly all public places including restaurants and most bars, is unconstitutional for several reasons.

A judge ruled in August that the group’s only viable complaint is that the act unfairly allows smoking in some areas — mainly casinos and fairgrounds — while banning it in other areas.

Some bar owners have complained that business has dropped off since the ban was instituted.