750 ILCS 5/609.5: Notification of remarriage or residency with a sex offender.

A parent who intends to marry or reside with a sex offender, and knows or should know that the person with whom he or she intends to marry or reside is a sex offender, shall provide reasonable notice to the other parent with whom he or she has a minor child prior to the marriage or the commencement of the residency.