Changes to Transport Act 1980 (Commencement No. 1) 1980
S.I. 1980/913
Made by Transport Act 1980 (Commencement No. 4) 1981
2 changes. All changes to Transport Act 1980 (Commencement No. 1) 1980
From legislation.gov.uk's record of changes, the official one: see it there.