Europe-wide assessments of proposals for the two EU Directives were made during their development. Limited changes to legislation for Great Britain to implement them will be in force by 20th May 2018. Impact assessments (including related to safety) of changes related to vehicles of historic interest and the testing of certain types of heavy goods vehicles have been published by the Department for Transport. Other changes had limited effects. Reviews of the effects of the four statutory instruments, which implement the changes in Great Britain, are required by May 2023.