I think you will find that if you have no vaccination card, the vet will want to give the full course again, although if she was done within the previous year, you should be able to get confirmation from the vet who did her.
Found this:
Manufacturers' recommendations are:
a. Primary course: 2 injections, 28-42 days apart.
b. First booster:168 days after 2nd primary injection.
c. Following boosters: Annually (within 365 days of preceding booster). However, if in a high risk group (competing, showing, etc) or during an outbreak, boosters should be given every 6 months.
The Jockey Club vaccination schedule is:
a. Primary course: 2 injections, 21-92 days apart.
b. First booster: Within 150-215 days of 2nd primary injection.
c. Following boosters: Annually (within 365 days of preceding booster). Advised to be given more frequently during an outbreak.
The FEI vaccination schedule is:
a. Primary course: 2 injections, 21-92 days apart.
b. Boosters: Annually (within 365 days of 2nd primary vaccination)