In the revised sentence, the status of the LLC as a managermanaged company is merely implied, not declared outright. An operating agreement is a basic legal document agreed to when someone forms a limited liability company (LLC).The most significant difference between operating agreements and bylaws is the type of business entity they govern. Operating agreements detail how the business will be managed, the roles of each member, and what to do in the case of disputes or dissolution of the business. An LLC operating agreement can be as simple or as complex as you want it to be. You can write your own agreement, or fill out our attorney-drafted template to generate your manager-managed LLC operating agreement for free. You can write your own agreement, or fill out our attorney-drafted template to generate your manager-managed LLC operating agreement for free. On the other hand, operating agreements govern the daytoday operations and management structure of the business. In the operating agreement, you should also describe the management and ownership structure of your LLC. An LLC operating agreement is a legal document that spells out the terms of a limited liability company to the members.