Section 56

In any prosecution under this Act, it shall be no objection to the admissibility of expert evidence that the expert is not or has not been a member of an unlawful society.

In any prosecution under this Act, the court may refer for the purposes of evidence to any of the following books —

“Thian Ti Hwui, the Hung League or Heaven-Earth League,” by

G. Schlegel;

“The Triad Society,” by W. Stanton;

“The Hung Society or the Society of Heaven and Earth,” by J. S.

M. Ward and W. G. Stirling;

“Triad Societies in Hong Kong,” by W. P. Morgan,

Societies 44

and to any other published books or articles on the subject of unlawful societies in general or of particular unlawful societies, which the court may consider to be of authority on the subjects to which they relate.

Service of documents.