Until 31 December 2019, Member States shall authorise entry into the Union of equine animals accompanied by the relevant animal health certificate drawn up in accordance with the model health certificates set out in Part 1, in Chapter 1 of Section B of Part 2 or in Part 3 of Annex II to Implementing Regulation (EU) 2018/659, as amended by Implementing Regulation (EU) 2018/1301, provided that the relevant animal health certificate was issued prior to 22 December 2019.