Unique means games that use different rules or settings but does not include rule revisions by the same author or publisher.

But arguments can be made against the rule revisions dealing with defense.

Mr. Bader said he was braced for attack, knowing that environmental groups were already saying any rule revision would inevitably amount to a relaxation of protections.

Mr. Leverence shrugged off the scheduling change, saying that this year's rule revisions could help to make up for what otherwise might be lower viewership.

This new edition is based around the Second Edition, incorporating some rule revisions from the Third, as well as a larger six-piece board.

It contained many of the changes that the Energy Department had championed, and was the foundation of the final rule revisions published in October 2003.

Minor rule revisions were made in the 1988 edition.

The exchange board meets tomorrow, when it is expected to announce a series of rule revisions to deal with market volatility.

Preparations for this morning resulted in some rule revisions at the major financial exchanges.

The ways in which the rules may be changed is developed within the context of generalized game theory based on the principle of rule revision and game restructuring.