The governing document of the LLC is called an operating agreement, and it is within this document that the members lay out all important provisions, such as standards for LLC governance, ownership parameters, and rules around member changes (adding or removing members, or what happens in case of death or incapacity of a member). The operating agreement is an internal document and is an agreement amongst the members or owners, which means it is not recorded with the state.
Decide if your LLC will be member-managed or manager-managed. A "member" of an LLC is either an owner of or investor in that LLC. A member-managed LLC affords each member equal rights in deciding how the business will be run. A manager-managed LLC is where the members elect several from their number to be responsible for the company's business affairs.