156. Unless otherwise specified, all working, walking and climbing areas must be illuminated to

• (a) an average level of 50 lx; and

• (b) a minimum level of 30 lx at any place in those areas.

• 157. (1) The average level of lighting at a task position set out in column 1 of the table to this subsection must not be more than the average level set out in column 2.

  	Column 1	Column 2
  Item	Task Position	Average Level in lx
  1.	VDT Work
  	(a) Task positions at which data entry and retrieval work are performed intermittently	500
  	(b) Task positions at which data entry work is performed exclusively	750

• (2) Reflection glare on a VDT screen must be reduced to the point where an employee at a task position is able to read every portion of any text displayed on the screen and see every portion of the visual display on the screen.

• (3) If VDT work requires the reading of a document, supplementary lighting must be provided where necessary to give a level of lighting of at least 500 lx on the document.

158. The following provisions do not apply in respect of vessels constructed before the day on which the MLC 2006 comes into force in Canada:

• (a) section 160; and

• (b) subsection 161(5).

159. The following definitions apply in this Part.

“A-weighted sound pressure level”

“A-weighted sound pressure level” means a sound pressure level as determined by a measurement system which includes an A-weighting filter that meets the requirements set out in the International Electrotechnical Commission International Standard IEC 61672-1:2002(E), 1^st edition 2002-2005 Electroacoustics – Sound Level Meters. (niveau de pression acoustique pondérée A)

“dBA”

“dBA” means decibel A-weighted and is a unit of A-weighted sound pressure level. (dBA)

“noise exposure level (L_ex,8)”

“noise exposure level (L_ex,8)” means 10 times the logarithm to the base 10 of the time integral over any 24-hour period of a squared A-weighted sound pressure divided by 8, the reference sound pressure being 20 µPa. (niveau d’exposition (L_ex,8))

“sound level meter”

“sound level meter” means an instrument for measuring levels of sound and impulse sound that meets the standards set out in CSA Standard CAN/CSA-Z107.56-06, Procedures for the Measurement of Occupational Noise Exposure. (sonomètre)

“sound pressure level”

“sound pressure level” means 20 times the logarithm to the base 10 of the ratio of the root mean square pressure of a sound to the reference sound pressure of 20 µPa, expressed in decibels. (niveau de pression acoustique)