Three Bridges is owned and run by Spectrum, a specialist provider of services to adults and children with autistic spectrum disorders (ASDs). Spectrum's senior management team is responsible for the school and answerable to a board of trustees.
A school management committee meets quarterly (or more frequently, if needed) to monitor the work of the school, review the School Improvement Plan (SIP) and make any recommendations to the trustees. The committee consists of a parent, an independent person, the Headteacher, Spectrum's CEO and a trustee.
Spectrum is registered as a charity under the name of Devon & Cornwall Autistic Community Trust which is a limited company registered in England and Wales. 
Registered office: Devon & Cornwall Autistic Community Trust, Lakeside Offices the Old Cattle Market, Coronation Park, Helston, Cornwall, United Kingdom. Company Number: 1662611. Registered Charity Number: 1026475