Article 60 1.

By 31 December 2018, the Commission shall submit a report to the European Parliament and to the Council regarding the assessment of the possibility of laying down harmonised measures for the installation of retrofit emission control devices in engines in non-road mobile machinery that has already been placed on the Union market. That report shall also address technical measures and financial incentive schemes as a means of helping Member States to comply with Union air quality legislation, by assessing possible action against air pollution in densely populated areas, and with due respect for the Union rules on state aid.