Can a 13 year old volunteer at a RSPCA center?

Hi My Name Is Emma,I love animals so much and I was wondering wether you have to be a certain age-im not sure on what the age is, and I would love to work with animals-I think I might be quite good at it.

HOW OLD DO YOU HAVE TO BE TO JOIN THE RSPCA ???

PLEASE ANSWER ME A.S.A.P !

i think its 16