115.155.  Registration — application — oath — transfer of data to election authority — documents, preservation of. — 1.  The election authority shall provide for the registration of each voter.  Each application shall be in substantially the following form:

  2.  The options for political party affiliation required by the application described in subsection 1 of this section shall include all established political parties and an option to be unaffiliated.  If an applicant does not designate an affiliation, the election authority shall mark the applicant's form as unaffiliated.

  3.  After supplying all information necessary for the registration records, each applicant who appears in person before the election authority shall swear or affirm the statements on the registration application by signing his or her full name, witnessed by the signature of the election authority or such authority's deputy registration official.  Each applicant who applies to register by mail pursuant to section 115.159, or pursuant to section 115.160 or 115.162, shall attest to the statements on the application by his or her signature.

  4.  Upon receipt by mail of a completed and signed voter registration application, a voter registration application forwarded by the division of motor vehicle and drivers licensing of the department of revenue pursuant to section 115.160, or a voter registration agency pursuant to section 115.162, the election authority shall, if satisfied that the applicant is entitled to register, transfer all data necessary for the registration records from the application to its registration system.  Within seven business days after receiving the application, the election authority shall send the applicant a verification notice.  If such notice is returned as undeliverable by the postal service within the time established by the election authority, the election authority shall not place the applicant's name on the voter registration file.

  5.  If, upon receipt by mail of a voter registration application or a voter registration application forwarded pursuant to section 115.160 or 115.162, the election authority determines that the applicant is not entitled to register, such authority shall, within seven business days after receiving the application, so notify the applicant by mail and state the reason such authority has determined the applicant is not qualified.  The applicant may file a complaint with the elections division of the secretary of state's office under and pursuant to section 115.219.  If an applicant for voter registration fails to answer the question on the application concerning United States citizenship, the election authority shall notify the applicant of the failure and provide the applicant with an opportunity to complete the form in a timely manner to allow for the completion of the registration form before the next election.

  6.  The secretary of state shall prescribe specifications for voter registration documents so that they are uniform throughout the state of Missouri and comply with the National Voter Registration Act of 1993, including the reporting requirements, and so that registrations, name changes and transfers of registrations within the state may take place as allowed by law.

  7.  All voter registration applications shall be preserved in the office of the election authority.