B-1.1, r. 2 - Construction Code

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10.25. When the deck of the swimming pool is adjacent to an area used for purposes other than bathing, an enclosure with a minimum height of 900 mm must separate the deck from that area. The enclosure used for that purpose must have no fixture, projection or opening enabling it to be climbed. It may, however, have openings provided that a spherical object of 100 mm in diameter cannot pass through them or, in the case of a chain link fence, that each link measures no more than 38 mm. The enclosure must be equipped at each entrance with a lockable barrier.
O.C. 115-2013, s. 1.