SDCL § 47-34A-404.2: Classes and voting.

Nothing in this chapter prohibits the articles of organization from establishing classes or groups of one or more members having certain expressed relative rights, powers, or duties, including voting rights and the articles of organization may provide for the future creation, in the manner provided in the articles of organization, of additional classes or groups of members having certain relative rights, powers, or duties, including voting rights, expressed either in the regulations or at the time of creation. The rights, powers, or duties of a class or group may be senior to those of one or more existing classes or groups of members.