At the famous New Zealand Commission of Inquiry into Chiropractic in 1978-79 Mr Chapman-Smith represented the New Zealand Chiropractors’ Association (NZCA) as legal counsel.

See his lecture Drama and Triumph at the NZ Commission of Inquiry which, nearly 25 years later, was the opening presentation at the NZCA Centenary Conference held in Wellington, New Zealand on June 10-11, 2023.