283.1. A telephone connecting the surface, equipped with a telephone connection jack for mine rescue, must be installed on the outside wall of the airlock of every refuge station built on or after 20 January 2011.
Each telephone connection jack must be inspected every 6 months. The inspections’ result must be recorded in a register.
O.C. 1190-2010, s. 10; O.C. 966-2015, s. 5.