# Northern Ireland Constitution Act 1973, Paragraph 9

Extent: E+W+S+N.I.

Trade with any place outside the United Kingdom but not—
(a) the furtherance of the trade of Northern Ireland or the protection of traders in Northern Ireland against fraud;
(b) services in connection with, or the regulation of, the quality, insurance, transport, marketing or identification of agricultural or food products, including livestock;
(c) the prevention of disease or the control of weeds and pests;
(d) aerodromes and harbours.

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Source: https://www.legislation.gov.uk/ukpga/1973/36/schedule/3/paragraph/9 (the official version)
Page: https://openlegislation.uk/northern-ireland-constitution-act-1973/schedule-3/paragraph-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.