On 10 February 1960, the Honourables Hugh Norman Guthrie M.L.A., John Trezise Tonkin M.L.A., Dr Guy Gavin Henn M.L.A., William Allan Manning M.L.A. and John Joseph Brady M.L.A. were appointed Royal Commissioners appointed to inquire into the provisions of the Natural Therapists Bill.

The Royal Commission's terms of reference were:

(1) To inquire into:

(a) The present position in Western Australia concerning the operations of and chiropractors, osteopaths and naturopaths, including facilities for and standards of (whether in Western Australia or elsewhere) training of such persons or any of them.

(b) The disabilities (if any) suffered by the public at large by reason of any existing legal limitation at present existing relative to practice by chiropractors, osteopaths or naturopaths.

(c) The desirability or otherwise of encouraging the practice in Western Australia by chiropractors, osteopaths and naturopaths.

(d) The desirability or otherwise of registering and the practicability of training (either in Western Australia or elsewhere in Australia) of: (a) chiropractors; (b) osteopaths; (c) naturopaths; or (d) all three classes of practitioners as natural therapists.

(e) The extent to which the methods used by such persons are now being used by persons registered under other Acts and the possibilities of the further development of such methods by persons registered under such other Acts.

(2) To report and submit such recommendations on the above matters as the Commission shall think fit.

The report of the Royal Commission was completed on 23 August 1961.