1.    An individual may not ask, solicit, or in any manner try to induce or persuade, any voter within a polling place or within one hundred feet [30.48 meters] from the entrance to the room containing a polling place while it is open for voting to vote or refrain from voting for any candidate or the candidates or ticket of any political party or organization, or any measure submitted to the people. The display upon motor vehicles of adhesive signs which are not readily removable and which promote the candidacy of any individual, any political party, or a vote upon any measure, and political advertisements promoting the candidacy of any individual, political party, or a vote upon any measure which are displayed on fixed permanent billboards, may not, however, be deemed a violation of this section.

2.    A vehicle or movable sign of any type containing a political message as described in subsection 1 may be allowed to remain within the restricted area only for the period of time necessary for the owner or operator of the vehicle or sign to complete the act of voting.

3.    Except as provided in subsection 1, a sign placed on private property which displays a political message may not be restricted by a political subdivision, including a home rule     city or county, unless the political subdivision demonstrates a burden to the public safety.