In the interest of clarity, predictability, rationality and simplification and in order to reduce the burden on manufacturers, and taking into account the current practice, it is necessary to further simplify and standardise the documents used for type-approval procedures.

In the interest of rationality and simplification and in order to reduce the burden on manufacturers, certain information documents submitted and test reports drafted in accordance with Directive 97/68/EC should be accepted for the type-approval procedures under Regulation (EU) 2016/1628.

The structure of the information document should be streamlined and simplified in order to avoid that the same information is repeated and to adapt it to the most common electronic format used by manufacturers and technical services.

For the purposes of comprehensiveness and completeness, the information document and the single format of the test reports should include information on those engine categories or fuel types which are new in the legislation on type-approval of engines for non-road mobile machinery.

In order to enhance the market surveillance activities, a new template for the statement of conformity should be established to clearly identify those engines placed on the market which are subject to certain exemptions or transitional provisions.

For the purposes of clarity and easing access to relevant data, the template of the EU type-approval certificate should contain an addendum containing the most relevant information related with the type-approved engine type or engine family.

The numbering system of the type-approval certificate should be revised in order to clearly identify each engine category and subcategory, as well as the fuel type, by a short alpha-numeric code in the interest of clarity and rationality.

For the purposes of clarity and completeness, the format of the list of engines produced should be adapted to the new designation of engine types and engine families and provide for all the information required by Article 37(1) of Regulation (EU) 2016/1628.

The data structure for the exchange of data by means of Internal Market Information System (IMI) should be limited to a basic outline in order to provide a certain level of freedom to the designers of the IT system and avoid the administrative burden of amending recurrently Annex VIII, as it would be necessary in the case of an excessively detailed structure.

The technical requirements and procedures for the interconnection of IMI with existing national databases should be limited to a basic outline in order to provide a certain level of freedom to the designers of the IT system and avoid the administrative burden of amending recurrently this Regulation, as it would be necessary in the case of setting out excessively detailed interconnection requirements which would not fit with the particular needs of each Member State.

For the purposes of clarity and simplification it is necessary to establish a harmonised system for the designation of engine types, engine families and engine types within the family.

In order to address their possible misuse, it is necessary to provide for detailed provisions on prevention of tampering with the engines.

The measures provided for in this Regulation are in accordance with the opinion of the Technical Committee — Motor Vehicles,