# The Air Navigation (Noise Certification) Order 1990, Part IX: NOISE STANDARDS REQUIRED FOR ISSUE OF A NOISE CERTIFICATE TO HELICOPTERS SPECIFIED IN ARTICLE 6(10)




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Source: https://www.legislation.gov.uk/uksi/1990/1514/schedule/1/part/IX (the official version)
Page: https://openlegislation.uk/air-navigation-noise-certification-order-1990/schedule-1/part-IX
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.