Here is a Membermanaged Operating Agreement template available in 3 formats. This can be used for a Single-Member LLC or a Multi-Member LLC.A Illinois Operating Agreement creates the policies and procedures for your LLC. Our free, attorney-drafted templates can get you started. Forms on this website are PDFs with fillable fields. Forms should be downloaded to your computer before filling in the fields. An Illinois LLC operating agreement is a binding document that establishes a company's ownership, operations, and officers. Each LLC must have an address for a principal place of business, which may or may not be in Illinois. LLCs must keep certain records at the principal place of. In the operating agreement, you should also describe the management and ownership structure of your LLC.