The law also prohibits any release of information on underage children which causes "fear, terror and panic, justifying abuse and unlawful behaviour", Xinhua reported citing Russia's RosBusinessConsulting (RBC) news agency.
It also bans any information that tempts children to use drugs or alcohol or provokes suicidal attempts.
The law's supplementary notes say such information must be presented to minors only "in measured and subtle form".
Medvedev has also focussed a large part of his work on children's affairs and has stressed that the state must do everything to ensure children's happiness.
(Published 04 January 2011, 03:18 IST)
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