a change of contractor cannot be made for technical reasons linked to interchangeability or interoperability requirements with existing equipment, services or installations;
nach féidir conraitheoir a athrú ar chúiseanna teicniúla atá nasctha le ceanglais idirmhalartachta nó idir-inoibritheachta le trealamh, seirbhísí nó suiteálacha atá ann cheana;