§ 168.471Petitions proposing constitutional amendments; filing; signature requirements

Sec. 471.
    Petitions under section 2 of article XII of the state constitution of 1963 proposing an
 amendment to the constitution must be filed with the secretary of state at least 120 days before
 the election at which the proposed amendment is to be voted upon. Initiative petitions under
 section 9 of article II of the state constitution of 1963 must be filed with the secretary of state
 at least 160 days before the election at which the proposed law would appear on the ballot if
 the legislature rejects or fails to enact the proposed law. Referendum petitions under section 9
 of article II of the state constitution of 1963 must be filed with the secretary of state not more
 than 90 days following the final adjournment of the legislative session at which the law that is
 the subject of the referendum was enacted. Not more than 15% of the signatures to be used to
 determine the validity of a petition described in this section shall be of registered electors from
 any 1 congressional district. Any signature submitted on a petition above the limit described in
 this section must not be counted. When filing a petition described in this section with the
 secretary of state, a person must sort the petition so that the petition signatures are categorized
 by congressional district. In addition, when filing a petition described in this section with the
 secretary of state, the person who files the petition must state in writing a good-faith estimate
 of the number of petition signatures from each congressional district.