Emissions of gaseous and particulate pollutants from internal combustion engines installed in non-road mobile machinery (NRMM) do not account for a large share of total emissions, but are still significant. Therefore, the European Union (EU) adopted Regulation 2016/1628, which seeks to limit emissions and define a system of type approval and market surveillance. The aim of this masters thesis is to design a proposal for checking NRMM type approval documentation, record keeping and market surveillance. At the beginning of the thesis it is defined what are NRMM and an overview of the division by category was made. Then, an overview of the legislative acts that were applied and are now applied to NRMMs was made, with an emphasis on Regulation 2016/1628 of the European Parliament and of the Council. It is shown who are the typical importers and distributors of NRMM in the Republic of Croatia. After that, a review was made of the type approval of road motor vehicles according to Regulation 2018/858 and how NRMM type approval is defined in Regulation 2016/1628. It is shown how the Republic of Croatia and the Federal Republic of Germany implemented it in their legislation. At the end of the thesis, a proposal was made for a new Ordinance that would determine compliance, monitor the market and keep records of internal combustion engines that are installed or have been installed in NRMM. It is believed that this would improve the current NRMM type-approval system.