If you compete, and any of those competitions are USEF licensed, then you need to stay up to date on the vaccine/vaccination rules. Also, be sure to find out the rules/regulations for your show’s manager and the facility you are showing at. Sometimes these can vary and be more strict, or also require things such as a veterinary health check prior to arrival at the grounds. We put a lot of money into each competition so we don’t want to get turned away at the gate for any reason!