Please retweet and repost: What Does This Sign Mean ?

I guess the choice is:

Either:

A: “The parking restriction here applies to motor caravans only, and they may not be parked here between the hours of 11pm and 7am.”

Or:

B: “The parking restriction here applies to all motor vehicles including motor caravans, and they may not be parked here between the hours of 11pm and 7am.”

Booth would go for Choice A. Am I wrong?