Engine types and engine families shall be designed and fitted with emission control strategies in such a way as to prevent tampering to the extent possible.
Déanfar cineálacha inneall agus aicmí inneall a dhearadh agus a fheistiú le straitéisí rialaithe astaíochtaí sa chaoi is go ndéanfar crioscaíl a chosc a mhéid is féidir.