Developing sound tax policy requires keeping several objectives in mind.

This algorithm does not require keeping any information about the access history.

Therefore, it requires keeping track of how the decision situation is evolving over time.

This algorithm requires keeping track of what was used when.

Little effort was required except to steer away from snags and keep within the current.

We couldn't do it from the air because the plan requires keeping the Prince alive.

Above all, this requires keeping the trail to Trnovo open.

The district is required to balance the budget by 1999 and keep it balanced for another four years before the control board would disband.

But if you're a bike messenger, business as usual also requires keeping your tank full.

But taking advantage of tax benefits requires keeping records, including receipts for gifts above $250.