31.   Now the Bush administration is preparing to flip back again, before the rules take effect next April.

32.   Once colonial rule left, tribal rule took over.

33.   Once rules took effect requiring marketwide display of quotes, ECNs became open systems that could swap orders with any market participant.

34.   Other new immigration rules could take effect as early as this week, depending on votes in Congress.

35.   Opponents have also said the program discourages people from working to raise their incomes and that its rules do not take all sources of income into account.

36.   Recognizing that, the government eased into the change by having the rule take effect on Holy Thursday, when nearly all employees in Mexico have the day off.

37.   Since the rules took effect about two years ago, Rojas said, the river has made a comeback.

38.   The new labeling rule will take effect in time for the apple cider season.

39.   The new rule takes effect immediately.

40.   The new rules also take account of computer technology that can squeeze more words onto a page by means of software with a compression feature.