All horses wishing to compete at any BC Competition must provide proof of an Equine Influenza vaccination recorded primary course, at least an annual booster schedule thereafter and the last booster given within a period of 6 months (+ 3 weeks) but not within 7 days prior to event arrival.

If a horse has failed to maintain the annual booster schedule they must start everything off again. If a horse has gone over the 6 month booster period but has had the horse vaccinated as above they are fine.

Extract from British Carriagedriving Rules for Horse Driving Trials

Annex 11 - National Passports (page 81)

1.3 Vaccinations for equine influenza must be given in accordance with the following provisions:-

1.3.1 All proprietary Equine Influenza vaccines are accepted, provided the route of administration complies with the manufacturer’s instructions (i.e. intramuscular injection or intranasal).

1.3.2 An initial Primary Course of two vaccinations must be given; the second vaccination must be administered within 21-92 days of the first vaccination.

1.3.3 The first booster must be administered within 7 calendar months following the date of administration of the second vaccination of the Primary Course.

1.3.4 Booster vaccinations must be administered at a maximum of 12 month intervals, the same day in each year being acceptable for these purposes, however Horses competing in Events must have received a booster within 6 months +21 days (and not within 7 days) before arrival at the Event.

1.3.5 Horses may compete 7 days after receiving the second vaccination of the primary course.

1.3.6 Horses that have received the Primary Course prior to 1 January 2005 are not required to fulfil the requirement for the first booster, providing there has not been an interval of more than 12 months between each of their subsequent annual booster vaccinations.

The FEI vaccination rules can be found at https://inside.fei.org/fei/your-role/veterinarians/biosecurity-movements/vaccinations