# The Hallmarking (International Convention) Order 2002, Paragraph


For the standards of fineness 999 and 925
Lisbon Assay Office
Oporto Assay Office
For the standards of fineness 830 and 800
Lisbon Assay Office
Oporto Assay Office
Platinum
For all standards of fineness recognised under the Convention
Lisbon Assay Office
Oporto Assay Office

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Source: https://www.legislation.gov.uk/uksi/2002/506/schedule/2/part/8/paragraph/wrapper13n1 (the official version)
Page: https://openlegislation.uk/hallmarking-international-convention-order-2002/schedule-2/part-8/paragraph-wrapper13n1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.