A standard definition of an unincorporated association was given in the English trust law case Conservative and Unionist Central Office v Burrell : '' ... where two or more persons are bound together for one or more common purposes by mutual undertakings , each having mutual duties and obligations , in an organization which has rules identifying in whom control of the organization and its funds are vested , and which can be joined or left at will . ''
An unincorporated association has been defined as existing : '' ... where two or more persons are bound together for one or more common purposes by mutual undertakings , each having mutual duties and obligations , in an organization which has rules identifying in whom control of the organization and its funds is vested , and which can be joined or left at will . ''