105 ILCS 5/22-70

At the time of annual enrollment or at any time during the school year, a school district or a recognized non-public school, except for sectarian non-public schools, serving any of grades kindergarten through 12 shall provide, either on its standard enrollment form or on a separate form, the opportunity for the individual enrolling the student to voluntarily state whether the student has a parent or guardian who is a member of a branch of the armed forces of the United States and who is either deployed to active duty or expects to be deployed to active duty during the school year. Each school district and recognized non-public school shall report this enrollment information as aggregate data to the State Board of Education.