NSW MP John Ruddick has announced he will challenge the federal government's world-first social media ban in the High Court.

In a statement, the Libertarian MP said he would argue the new law coming into effect next month is unconstitutional as it violates the "implied constitutional freedom of political communication".

He will be filing with the court, via the Digital Freedom Project he leads, "imminently".

"The guts of the matter is that to have a social media account in Australia from 10 December you will need to prove to the social media platform you are over 16," he said.

"That's going to be a hassle for social media users and a huge administrative burden for the social media platforms.

"Lots of bright young kids who are curious about science or history or whatever learn so mu

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