I'm sure they have some say over it. Even if there aren't specific laws regarding yard sales, there are laws and requirements regarding commercial enterprises (licensing requirements, zoning restrictions). And, I suspect that some of the rules/laws/precedents/guidelines which dictate what constitutes a commercial enterprise take into account frequency of activity.
Point being, even if there aren't laws which specifically say 'these laws are for yard sales', there are laws that might be applicable.