Provided such changes to the initial conditions of the procurement contract were envisaged in the initial tender contract or are justified by one of the circumstances listed in the Procurement Directives (in particular, Articles 31 and 61 of Directive 2004/18/EC relating to the award of additional supplies, services or works) and comply with any additional national rules that may exist on this issue.
Ar chuntar gur samhlaíodh athruithe den chineál sin ar choinníollacha tosaigh an chonartha soláthair sa chonradh tairisceana tosaigh nó go bhfuil siad dlisteanaithe ag cuid de na himthosca aliostaítear sna Treoracha Soláthair (go háirithe Airteagail 31 agus 61 de Threoir 2004/18/CE indáil le soláthairtí, seirbhísí nó oibreacha breise adhámhachtain) agus go gcomhlíonann siad aon rialacha náisiúnta breise ad’fhéadfadh abheith ann maidir leis an tsaincheist sin.