# The Railway (Licensing of Railway Undertakings) Regulations 2005, Paragraph 3


(1) For the purposes of paragraph 2, a person has been convicted of a serious offence if that offence was committed under the law of any part of the United Kingdom or under the law of a country or territory outside the United Kingdom and if on conviction there was imposed on him for that offence a sentence of imprisonment for a term exceeding three months.
(2) In sub-paragraph (1), the reference to a sentence of imprisonment includes a reference to any form of custodial sentence or order, other than one imposed under the enactments relating to mental health.

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Source: https://www.legislation.gov.uk/uksi/2005/3050/schedule/2/paragraph/3 (the official version)
Page: https://openlegislation.uk/railway-licensing-of-railway-undertakings-regulations-2005/schedule-2/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.