From the source we are told that "By June 2017 where appropriate our procurement procedures will include steps implemented through specific questions in our supplier evaluation procedures also implemented in their standard terms and conditions with suppliers".

Yes they outline they will be implementing evaluation procedures

By June 2017, and where appropriate, our procurement procedures will include steps to identify, mitigate and monitor potential modern slavery risks in our supply chain. This will be implemented through specific questions in our supplier evaluation procedures. Additionally, our standard terms and conditions for suppliers will mandate compliance with the Modern Slavery Act 2015.1