Only one application shall be submitted in respect of a particular engine type or, where applicable, engine family, and it shall be submitted to only one approval authority.
Ní chuirfear ach aon iarratas amháin isteach i leith cineál áirithe innill nó, i gcás inarb infheidhme, i leith aicme áirithe inneall, agus is chuig aon údarás ceadúcháin amháin a chuirfear isteach é.