[1] He was elected a member of the AJC in 1892, and the committee in 1912, serving on the Sir Adrian Knox sub-committee which framed the rules of racing of that year.
In 1933 he was tasked with formulating a set of revised rules of racing to be adopted throughout Australia.
[2] Stephen was a successful rider and owner; his racing colours were pale blue with a white cap.
His horses included Fidelity, who won the Ascot Vale Stakes in 1936, and Caesar, who took the 1937 race from Ajax.
[3] The AJC Spring Stakes race was renamed Colin Stephen Quality Handicap in 1938.