In a new police program, automobile owners in some neighborhoods whose cars are not normally driven between 1 A  M  and 5 A  M  can display a special decal in the cars' windows and authorize police to stop the cars during those hours to check the drivers' licenses
The theft rate for cars bearing such decals is much lower than had been usual for cars in those neighborhoods
Are owners who are cautious enough to join the program taking other special measures to protect their cars against theft.