As WSFS itself is an unincorporated society, each Worldcon is organized by a separate committee (usually) legally incorporated in the local jurisdiction; in the United States, these are usually organized as 501(c)(3) non-profit corporations, while in the United Kingdom, they are usually operated by companies limited by guarantee. The local organizers may be standalone, one-time committees (organized to hold the one event and then disbanded afterwards), or they may be organized by an existing local group. A few groups, such as MCFI in Boston, SFSFC (San Francisco Science Fiction Conventions, Inc.) in northern California, and SCIFI (Southern California Institute for Fan Interests Inc.) in southern California are permanent corporations established to manage Worldcons (or other one-off or rotating conventions) in different years in the same geographical area.
As WSFS itself is an unincorporated society each Worldcon is organized by a separate committee (usually) legally incorporated in the local jurisdiction; in the United States these are usually organized as 501(c)(3) non-profit corporations while in the United Kingdom they are usually operated by companies limited by guarantee The local organizers may be standalone one-time committees (organized to hold the one event and then disbanded afterwards) or they may be organized by an existing local group A few groups such as MCFI in Boston SFSFC (San Francisco Science Fiction Conventions Inc) in northern California and SCIFI (Southern California Institute for Fan Interests Inc) in southern California are permanent corporations established to manage Worldcons (or other one-off or rotating conventions) in different years in the same geographical area