The micro-blogging platform said it will not allow users to like, reply, share or retweet offending posts from world leaders.
"You will not be able to like, reply, share, or Retweet the Tweet in question. You will still be able to express your opinion with Retweet with Comment," the company said on Tuesday.
"Our goal is to enforce our rules judiciously and impartially. In doing so, we aim to provide direct insight into our enforcement decision-making, to serve public conversation, and protect the public's right to hear from their leaders and to hold them to account," it added.
Twitter has been facing pressure to take action against US President Donald Trump for posting controversial tweets, but the micro-blogging platform has been evading action.
Earlier this month, California Senator Kamala Harris, who is a 2020 Democrat presidential candidate, asked Twitter to suspend Trump's account for attacking lawmakers and the whistleblower behind a complaint on his shady dealings with Ukraine.
"Trump's Twitter account should be suspended. There's plenty of evidence to suggest that he is irresponsible with his words in a way that could result in harm as the privilege of using those words in that way should probably be taken from him," Harris told CNN.
Trump has repeatedly used Twitter to attack his political opponents.
In a series of tweets, he said that House Intelligence Chairman Adam Schiff should be arrested for treason for exaggerating parts of phone call Trump had with Zelensky.
If a tweet from a world leader does violate its rules, but there is a clear public interest value to keeping the Tweet on the service, the company said on Tuesday that it "may place it behind a notice that provides context about the violation and allows people to click through should they wish to see the content".
"With critical elections and shifting political dynamics around the world, we recognise that we're operating in an increasingly complex and polarised political culture," said Twitter.
"These are constantly evolving challenges and we'll keep our policies and approach under advisement, particularly as we learn more about the relationship between Tweets from world leaders and the potential for offline harm," it added.
( With inputs from IANS )