31.   But it is so poorly worded that fair enforcement is impossible.

32.   But John Aristotle Phillips, a San Francisco information broker who has sued his competitors for violating privacy laws, said current enforcement is much too weak.

33.   But law enforcement can be in only so many plaqes to try to quell the heroin problem.

34.   But smoking is still so widespread that enforcement is still uneven, and barely beginning in many cities.

35.   But the enforcement is likely to remain highly politicized, with little clear sign of why some companies are delisted and not others.

36.   But stiffer enforcement is difficult.

37.   But there has typically been little enforcement, largely because the agencies are understaffed.

38.   But the fact is that for years, enforcement was not a high priority, either.

39.   But the rules on how to carry out the laws are vague and enforcement is difficult.

40.   But what is more, enforcement is uneven, with the Air Force considered most likely to prosecute.