765 ILCS 745/9
The terms for payment of rent shall be clearly set forth and all charges for services, ground or lot rent, unit rent, or any other charges shall be specifically itemized in the lease and in all billings of the tenant by the park owner.
The owner shall not change the rental terms nor increase the cost of fees, except as provided herein.
The park owner shall not charge a transfer or selling fee as a condition of sale of a mobile home that is going to remain within the park unless a service is rendered.
Rents charged to a tenant by a park owner may be increased upon the renewal of a lease. Notification of an increase shall be delivered 90 days prior to expiration of the lease.
The park owner shall not charge or impose upon a tenant any fee or increase in rent which reflects the cost to the park owner of any fine, forfeiture, penalty, money damages, or fee assessed or awarded by a court of law against the park owner, including any attorney's fees and costs incurred by the park owner in connection therewith unless the fine, forfeiture, penalty, money damages, or fee was incurred as a result of the tenant's actions.
The park owner shall not charge or impose a pet fee upon a resident that owns the home, unless a service related to the pet is offered by the park owner and accepted by the resident. A tenant of a home owned by the park owner may be subject to the imposition of a pet fee as agreed to in the lease.
765 ILCS 745/9