Islamic State theologians have issued an extremely detailed ruling on when "owners" of women enslaved by the extremist group can have sex with them, in an apparent bid to curb what they called violations in the treatment of captured females.

The ruling or fatwa has the force of law and appears to go beyond the Islamic State's previous known utterances on slavery, a leading Islamic State scholar said. It sheds new light on how the group is trying to reinterpret centuries-old teachings to justify the rape of women in the swaths of Syria and Iraq it controls.

For a U.S. government translation of the fatwa click graphics.thomsonreuters.com/doc/slaves_fatwa.pdf.