The Auto-Cycle Union (ACU), a state-owned organization founded in 1904, is the governing body for motorcycle sports in the British Isles. Its jurisdiction encompasses the Channel Islands and the Isle of Man, but excludes Northern Ireland and the Republic of Ireland. As of 2023, the ACU employs approximately 20 people and is headquartered on the Isle of Man. Its primary function is the organization and regulation of motorcycle sporting events.
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