11.   As the elderly couple learned, enforcement can be capricious.

12.   Authoritarian enforcement may be distasteful to the West.

13.   Because police enforcement has often been lax, some spots are occupied all day by cars and vans that have commercial license plates, but do not make deliveries.

14.   -- Child-support enforcement is not enough.

15.   A report attached to the bill explained that immigration law enforcement was as high a priority as any other form of law enforcement.

16.   A survey earlier this year by Elron Software, a publisher of monitoring software, shows that Internet policy enforcement is far from airtight.

17.   A. Antitrust enforcement is a hippopotamus.

18.   Burl Condit is a throwback to the small-town era when law enforcement was less formal, she explained.

19.   But as noise complaints rise, there is little evidence that enforcement is keeping pace.

20.   But at the same time, researchers note that enforcement may not be the only reason that parasites like the cuckoos are destroying nests.