Iowa Code § 216.20: Effect on other law.

1. This chapter does not affect:

a. A reasonable local or state restriction on the maximum number of occupants permitted to occupy a dwelling.

b. Tenancy of an individual that would constitute a direct threat to the health or safety of other individuals or tenancy that would result in substantial physical damage to the property of others.

2. This chapter does not affect a requirement of nondiscrimination in other state or federal law.