C-25.1, r. 5 - Rules of practice of the Québec Superior Court in Penal Matters

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6. During session of the court, the following attire is obligatory:
(a)  for members of the bar: black gown, bands, white collar and dark clothing;
(b)  for articled students: black gown and dark clothing;
(c)  for the court clerk and usher: black gown and dark clothing.
The wearing of the gown is not required during the months of July and August.
O.C. 1112-2001, s. 6.