# The Pollution Prevention and Control (Industrial Emissions) Regulations (Northern Ireland) 2013, Paragraph 4: Interpretation - general


In this Schedule—
“back-up generator” means a generator operated for the sole purpose of maintaining power supply at a site during an on-site emergency;
“balancing services” means any services procured by the transmission system operator in order to balance demand and supply, and to ensure the security and quality of electricity supply;
“capacity auction” means a capacity auction conducted under Chapter F [of the Capacity Market Code] for allocating Awarded Capacity to Capacity Market Units and includes T-1 Auctions, T-2 Auctions, T-3 Auctions and T-4 Auctions;
“capacity market framework agreement” means the agreement (including an Accession Deed) under which a person becomes bound by this Code;
“distribution system” has the meaning given in Article 3 of The Electricity (Northern Ireland) Order 1992;
“emission limit value” means the permissible maximum quantity of a substance contained in the waste gases from a generator which may be discharged into the air during a given period;
“nitrogen oxides” means nitric oxide and nitrogen dioxide;
“transmission system” has the meaning given in Article 3 of The Electricity (Northern Ireland) Order 1992;
“transmission system operator” means the person or persons operating the transmission system for Northern Ireland; and
any reference to emissions expressed in mg/Nm3 is to those emissions defined in accordance with Annex II of the Medium Combustion Plant Directive.

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Source: https://www.legislation.gov.uk/nisr/2013/160/schedule/9B/paragraph/4 (the official version)
Page: https://openlegislation.uk/pollution-prevention-and-control-industrial-emissions-regulations-northern-ireland-2013/schedule-9B/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.