为啥同一家 CA 颁发的通配符证书 CPS 会不一样?

[20140930]

CN = *.linode.com
OU = Domain Control Validated - RapidSSL(R)
OU = See www.rapidssl.com/resources/cps (c)15
OU = GT15858513
============
CN = *.name.com
OU = Domain Control Validated - RapidSSL(R)
OU = See www.rapidssl.com/resources/cps (c)14
OU = GT85507400
为啥一个cps是14一个是15？有什么不同嘛?

[alect]

Certification Practice Statement 认证业务规则，每隔一段时间SSL服务商会更新这个规则的，版本号越新说明证书签发的越晚，你研究这一点儿用都没有唉