Mo. Rev. Stat. § 116.100
The secretary of state shall not accept any referendum petition submitted later than 5:00 p.m. on the final day for filing referendum petitions. The secretary of state shall not accept any initiative petition submitted later than 5:00 p.m. on the final day for filing initiative petitions. All pages shall be submitted at one time. When an initiative or referendum petition is submitted to the secretary of state, the signature pages shall be in order and numbered sequentially by county, except in counties that include multiple congressional districts, the signatures may be ordered and numbered using an alternate numbering scheme approved in writing by the secretary of state prior to submission of the petition. Any petition that is not submitted in accordance with this section, disregarding clerical and merely technical errors, shall be rejected as insufficient. After verifying the count of signature pages, the secretary of state shall issue a receipt indicating the number of pages presented from each county. When a person submits a petition he or she shall designate to the secretary of state the name and the address of the person to whom any notices shall be sent under sections 116.140 and 116.180.
§ 116.100, RSMo
Effective 6/16/1999