Report from the Commission to the Council on the re-introduction of the visa requirement by Canada for citizens of the Czech Republic in accordance with Article 1(4)(c) of Council Regulation (EC) No 539/2001 listing the third countries whose nationals must be in possession of visas when crossing the external borders and those whose nationals are exempt from that requirement, as amended by Council Regulation (EC) No 851/2005 as regards the reciprocity mechanism