Policia Estatal Acreditable

I just noticed the "Acreditable" sign on Policia Estatal pick-ups.
Google translates that to the English "creditable", which can mean "commendable, praiseworthy, laudable, admirable, honourable, meritorious, worthy, deserving, respectable....etc.....attributes we'd all like to see in our police forces.
I suspect, however, that a more literal translation is the right one: the Spanish "acreditable" in this sense probably means the same as the English "accredited": to certify as meeting prescribed standards or requirements. In other words, "We passed all the tests."
Either way, it's an odd word to stick on a police vehicle. Could it be a measure of just how untrustworthy police had become?