Safety, Health and Welfare at Work (General Application) Regulations 2007
Combustion engines of mobile work equipment.
37. An employer shall ensure that mobile work equipment with a combustion engine is not used in working areas unless -
(a) specific provision is made for conducting the exhaust gases from the engine into the open air, or
(b) the working area is adequately ventilated so as to prevent danger to health from the exhaust gases.