Doubt Regarding Putting News In Your Site.

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Suppose any body wants to give some news in his site like any national or international news which he or she hears from some where or reads some where and if he or she wants to add it in his website in his own words then is it legal to do so. Or if he or she wants to organize some discussion on that point and shoot it and wants to add it in the website then is it legal or some special registration for the same is necessary. I know that if we want to add a news as it is in our website then from some websites it is allowed the only thing is to add the source to it and give a link to that specific site. But I want to know about any news which we want to change entirely in our words and then putting into our website what is it exact law point behind it. Please help me with some good suggestions on this point. Thanking you all in advance.?