Mich. Comp. Laws § 168.475

Sec. 475. (1) Upon the final submission of a petition as to form under this chapter, the secretary of state shall immediately notify the board of state canvassers of the submission of the petition. In addition, upon the final submission of a petition under this chapter, the secretary of state shall within 2 business days post on the department of state's website the proposed constitutional amendment, initiated law, or referendum and the date the petition was submitted to the secretary of state. (2) Upon the filing of a petition with signatures under section 471 or 473, the secretary of state shall immediately notify the board of state canvassers of that filing. After the day on which a petition and signatures are filed, the secretary of state must not accept further filings of signatures to supplement the original filing. On the first business day of every month after the date a petition and signatures were filed, the secretary of state shall post on the department of state's website an update on the status of that petition. The secretary of state may update the status of a petition on a more frequent basis than required under this subsection.