Security forces are allowed to use what's called "necessary force" to maintain order and can search people and premises without a warrant.

安保部队被允许使用所谓的“必要武力”来维持秩序，他们可以在没有搜查令的情况下搜查人员和房屋。

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"The overall forces posture of ISAF and of the Afghan security forces as well is increasing, so we do have the necessary force posture."

VOA: standard.2010.08.04

But beyond what is necessary for these purposes, there will be no invasion, no using of force against or among the people anywhere."

VOA: special.2009.07.30

Lincoln said if force was necessary to protect the Union, then force would be used.

VOA: special.2009.08.06

But Mr Kaiser appears to have the discipline necessary to force obvious changes through where others fail.

ECONOMIST: All right after the first night?

It will still be necessary for force protection and our counter-terrorism mission and to -- and to do -- continue training of Iraqi forces.

CNN: Army chiefs urge caution for Obama's planned troop cuts

New laws and prosecutions could be necessary to force Amazon, Google and other multinationals pay a fairer amount of corporation tax in the UK, according to MPs.

FORBES: Links 3 Dec: Apple, Google, Facebook, Amazon. The European Taxmen Are Going After Them All