in terms of performance or of functional requirements, including environmental characteristics, provided that the parameters are sufficiently precise to allow tenderers to determine the subject matter of the contract and to allow the contracting authority to award the contract;
i dtéarmaí ceanglais feidhmíochta nó fheidhmiúla, lena n-áirítear saintréithe comhshaoil, ar an gcoinníoll go bhfuil na paraiméadair cruinn a dhóthain chun cur ar chumas tairgeoirí ábhar an chonartha a chinneadh agus chun cur ar chumas an údaráis chonarthaigh an conradh a dhámhachtain;