This rule ensures the total sum of points won/lost in a round is always zero.

These rules will ensure more seamless wireless data services, which consumers have come to expect.

On its face, rigid rules limit the powers of the person doing enforcement and thus should ensure equal treatment for everyone.

A few simple rules will ensure that you win pretty consistently.

The last rule ensures that neither player knows upon adjournment what the position will be when it is next their turn to move.

Of course there have to be some rules but try and ensure that there is a good reason for them.

The nine rules ensure the external and internal integrity of the data items.

Clear rules ensure that everyone participating in the political process is treated equally.

Normal rules will ensure there is no conflict of interest.

But the 17 euro countries require rules to ensure the stability of the currency.