The European Union is poised to ban artificial intelligence systems used for mass surveillance or for ranking social behavior, while companies developing AI could face fines as high as 4% of global revenue if they fail to comply with new rules governing the software applications. The rules are part of legislation set to be proposed by the European Commission, the bloc's executive body, according to a draft of the proposal obtained by Bloomberg. The details could change before the commission unveils the measure, which is expected to be as soon as next week. European member states would be required to appoint assessment bodies to test, certify and inspect the systems, according to the document. Companies that develop prohibited AI services, or supply incorrect information or fail to cooperate with the national authorities could be fined up to a maximum of 4% of global revenue.