I can tell you that the local police in the Town hall I work in - have been told (by the mayor) to start checking foreign plated cars and NIE's. And also insurance. This as of last month. Right now ANY excuse to recuperate revenue is been taken. In larger towns the effort may be too great.

The GC is also stepping up spot checks. If they are in ANY doubt - the vehicle will be impounded. The GC ime will check ALL PAPERS - every time - as will national Police (Trafico). Unlike the local police they are specifically sent out to trap traffic violators.