Bing and Google have agreed to demote sites in UK SERPs which pirate music, movies, and sites which stream live sport illegally.
The code - said to be the first of its type in the world - is expected to be in operation by the summer.
Google has indicated that the effort would provide a way to check that its existing anti-piracy efforts were effective, rather than committing it to adding new measures.
The Intellectual Property Office led the discussions, with the assistance of the Department for Culture, Media and Sport. Bing and Google Agree to Demote Pirated Music and Movie Sites in UK [bbc.co.uk]