Article 2
For the purpose of the reference document: (a) ‘rule’ shall mean a requirement applicable in a Member State and to be complied with by the applicant for the authorisation of placing in service of vehicles, where the requirement is related to: — a parameter of the list set out in the Annex to Decision 2009/965/EC, and/or — verification and testing requirements, and/or — a process to be used to gain authorisation for placing in service of vehicles; (b) ‘classification’ means the attribution given by one Member State to another Member State’s national rule covering a particular parameter according to one of the three groups A, B or C, which are defined in Section 2 of Annex VII to Directive 2008/57/EC.