21.   The dispute centered on the scope of an anti-retaliation law, which forbids companies from punishing workers who complain about possible violations of federal fair-labor rules.

22.   The dispute centers on the lucrative cargo market in Asia.

23.   The dispute centers on the terms of the contract, and Tagliabue made his decision after a one-hour conference call yesterday.

24.   The dispute centers on timing.

25.   The dispute would center largely around whether she should have gone to a different treatment facility.

26.   The disputes center on two river basins.

27.   The dispute centers on a FedEx demand that its pilots fly more hours.

28.   The dispute centers on differences about health and safety issues, outsourcing and treatment of minorities, he said.

29.   The dispute centers on how well Bankers Trust disclosed the nature of the risky elements of the transaction.

30.   The dispute centers on the Hart-Scott-Rodino antitrust law, which requires companies in all industries to submit significant acquisitions for federal antitrust review.