http://www.legislation.gov.uk/eur/2018/545/article/42Commission Implementing Regulation (EU) 2018/545 of 4 April 2018 establishing practical arrangements for the railway vehicle authorisation and railway vehicle type authorisation process pursuant to Directive (EU) 2016/797 of the European Parliament and of the Council (Text with EEA relevance)Commission Implementing Regulation (EU) 2018/545Commission Implementing Regulation (EU) 2018/545 of 4 April 2018 establishing practical arrangements for the railway vehicle authorisation and railway vehicle type authorisation process pursuant to Directive (EU) 2016/797 of the European Parliament and of the Council (Text with EEA relevance)2020-12-12King's Printer of Acts of Parliamenthttps://webarchive.nationalarchives.gov.uk/eu-exit/https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02018R0545-20200616texttext/xmlen2020-06-16 CHAPTER 6 <Strong>PROCESSING THE APPLICATION</Strong> Justified doubt Article 42 1 Where there is a justified doubt, the authorising entity and/or the concerned NSAs for the area of use may, alternatively, do one or more of the following: a perform a more thorough and detailed check of the information provided in the application; b request supplementary information from the applicant; c request that the applicant conducts tests on the network. 2 The request from the authorising entity and/or the concerned NSAs for the area of use shall specify the matter that requires action from the applicant but shall not specify the nature or content of the corrective actions to be performed by the applicant. The applicant shall decide on what is the most suitable way for it to answer to the request from the authorising entity and/or the concerned NSAs for the area of use in. 3 The authorising entity shall coordinate with the concerned NSAs for the area of use regarding the actions proposed by the applicant. 4 The authorising entity and the concerned NSAs for the area of use shall, without prejudice to the provisions of Article 35, use the issues log referred to in Article 41 to manage any justified doubts. A justified doubt shall always: a be classified as a type 4 issue pursuant to Article 41(1)(d); b be accompanied by a justification; and c include a clear description of the matter that needs to be answered by the applicant. 5 Where the applicant agrees to provide supplementary information, pursuant to points (b) and (c) of paragraph 1 at the request of the authorising entity and/or the concerned NSAs for the area of use, the time frame to provide that supplementary information shall be established in accordance with Article 34(5) and Article 34(6). 6 Where it is possible to remove a justified doubt by introducing additional and/or more restrictive conditions for use of the vehicle and other restrictions as compared to those specified by the applicant in its application and the applicant so agrees, a vehicle type authorisation and/or vehicle authorisation for placing on the market may be issued under such conditions for use of the vehicle and other restrictions. 7 Where the applicant does not agree to provide further information to remove the justified doubt raised by the authorising entity and/or the concerned NSAs for the area of use, the authorising entity shall take a decision on the basis of the available information.