Michigan Compiled Laws, Chapter 333. Health § 333.9211

Sec. 9211. (1) A parent, guardian, or person in loco parentis applying to have a preschool aged child registered in a program of group residence, care, or camping shall present to the operator of the program at the time of registration or not later than the first day of the program a certificate of immunization or a statement of exemption under section 9215.  1 The operator of the group program shall not permit a child to attend the group activity unless a minimum of 1 dose of an immunizing agent against each of the diseases specified by the department has been received and certified to by a health professional or local health department. A parent, guardian, or person in loco parentis of a child registered with only these minimum doses of an immunizing agent and continuing enrollment in the group program shall present an updated certificate of immunization within 4 months after initial attendance showing that the immunizations have been completed as prescribed by the department, if the child remains in the program.

(2) Upon request by the department or local health department, a program operator shall report to the state and local health departments the immunization status of each child accepted.