# Road Traffic Act 1991, Paragraph 89 In section 21(3) of that Act (evidence of one witness sufficient in Scotland in relation to certain offences) for the words β€œor 36” there shall be substituted the words β€œ , 36 or 172. ” --- Source: https://www.legislation.gov.uk/ukpga/1991/40/schedule/4/paragraph/89 (the official version) Page: https://openlegislation.uk/road-traffic-act-1991/schedule-4/paragraph-89 Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.