# The Large Combustion Plant (Control of Emissions) (Scotland) Regulations 1991, Regulation 3: Maximum emission levels for existing plants


lt shall be the duty of the operator of each plant to ensure that the emissions of sulphur dioxide and oxides of nitrogen from the plant during the period from 1st April 1991 until 31st December 1991 and during 1992 do not exceed the maximum permitted levels specified for that plant in respect of those periods in the HMIPI Register.

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Source: https://www.legislation.gov.uk/uksi/1991/562/regulation/3 (the official version)
Page: https://openlegislation.uk/large-combustion-plant-control-of-emissions-scotland-regulations-1991/regulation-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.