200 million Facebook users around the world, which includes 400,000 in Ireland, are being given the chance to have a say on the policy. They have one week to vote.
52 million users will have to vote against this idea. Otherwise, it gets implemented.
Facebook has said that it would not want comment ahead of the vote as it did not want to prejudice the result.
An RTÉ News report broadcast on 16 April 2009. The reporter is Brian Finn.