Iowa Code
Chapter 729A - VIOLATION OF INDIVIDUAL RIGHTS — HATE CRIMES
Section 729A.3 - Local ordinances.

729A.3 Local ordinances.
This chapter does not prohibit political subdivisions from enacting ordinances which are consistent with this chapter. Local ordinances reasonably regulating the time, place, or manner of the exercise of constitutional rights are permissible.
92 Acts, ch 1157, §10