Class 5 specifications - kicking strap

Hi there,
I'm translating Class 5 Specifications in Italian.
On this point:
S7. The sail may be modified by a device as follows :
1. Cunningham hole
2. Foot tensioner
3. Kicking strap
4. Batten tensioner line or leach line.
What's a kicking strap? Is it the same for vang? Pics appreciated
Thanks and cheers - Enrico
I'm translating Class 5 Specifications in Italian.
On this point:
S7. The sail may be modified by a device as follows :
1. Cunningham hole
2. Foot tensioner
3. Kicking strap
4. Batten tensioner line or leach line.
What's a kicking strap? Is it the same for vang? Pics appreciated

Thanks and cheers - Enrico