1. The contracting authority must exclude from the procedure the tenderers, candidates, subcontractors, or entities contributing to the certification of suitability
a) who are subject to the grounds for exclusion (Articles 62 and, where the contracting authority provided for it, Article 63);
b) on whose side any ground for exclusion arose in the course of the procedure.
2. The contracting authority may exclude from the procedure
a) the tenderers or candidates who are not eligible for national treatment [Article 2(5)],
b) the tenderers who offer a product not eligible for national treatment due to its place of origin [Article 2(5)].
3. The place of origin of products shall be established on the basis of the rules stipulated in a separate act of legislation or in Regulation (EU) No 952/2013 of the European Parliament and the Council of 9 October 2013 laying down the Union Customs Code.