On Board Trains Occupational Health and Safety Regulations

4.6 Where in rolling stock that is a work place the level of sound is 87 dB or more or where the peak level of impulse sound exceeds 140 dB, the employer shall post signs in the rolling stock warning persons entering it

• (a) that there is a hazardous level of sound or impulse sound in the rolling stock;

• (b) if applicable, of the maximum number of hours of exposure determined under subsection 4.2(2); and

• (c) if applicable, of the requirement to wear a hearing protector.