For the purposes of the single area payment scheme provided for in Section 4 of Chapter 1 of Title III of Regulation (EU) No 1307/2013, including any reference in Regulation (EU) No 1307/2013 to eligible hectares declared for the purposes of that scheme, only those eligible hectares shall be taken into account which are determined within the meaning of point (23)(a) of the second subparagraph of Article 2(1) of Delegated Regulation (EU) No 640/2014.