1.   But even sedentary work can be tiring, and the doctors have asked him to limit its duration.

2.   Concerned investors can choose funds whose durations are limited by their charters.

3.   Other democratic nations operate just fine by limiting the duration that political candidates are allowed to campaign.

4.   President Pervez Musharraf of Pakistan has publicly called on the United States to limit the duration of overt military action.

5.   States would have broad authority to determine eligibility, limit the duration of benefits and require work.