# Motor Vehicles (Construction and Use) Regulations (Northern Ireland) 1999, Paragraph 4


In this Schedule—
(a) “British Standard BS AU 193: 1983” means the British Standard Specification for replacement motor cycle and moped exhaust systems published by the British Standards Institution under reference number BS AU 193:1983;
(b) “British Standard BS AU 193a: 1990” means the British Standard Specification for replacement motor cycle and moped exhaust systems published by the British Standards Institution under reference number BS AU 193a: 1990.

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Source: https://www.legislation.gov.uk/nisr/1999/454/schedule/9/part/II/paragraph/4 (the official version)
Page: https://openlegislation.uk/motor-vehicles-construction-and-use-regulations-northern-ireland-1999/schedule-9/part-II/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.