This month's update appears in the September edition of the free newspaper Hua Hin Today (2nd search result on Google).
A Big Cheese in the Immigration Dept. has overturned the Dept's. previous stance (that it was a LEGAL REQUIREMENT to carry your pp around at all times).
As of now, they are saying that of course it would be unreasonable to carry it about all the time. A copy is all you need to have on you...
The official also stated that if you break the law then the original pp must be produced urgento - really, no kidding!
The above info was correct when I hit the Enter key...