where the works, supplies or services can only be provided by a single economic operator under the conditions set out in point 11.3 and for any of the following reasons:
i gcás nach féidir ach le hoibreoir eacnamaíoch amháin na hoibreacha, na soláthairtí nó na seirbhísí a chur ar fáil faoi na coinníollacha a leagtar amach i bpointe 11.3 agus ar cheann ar bith de na cúiseanna seo a leanas: