http://www.ohchr.org/Documents/Publications/Compilation1.1en.pdf http://www.ohchr.org/Documents/Publications/GuidingPrinciplesBusinessHR_EN.pdf http://www.ohchr.org/Documents/Publications/GuidingPrinciplesBusinessHR_EN.pdf http://www.ohchr.org/Documents/Publications/GuidingPrinciplesBusinessHR_EN.pdf http://www.vodafone.com/content/index/about/conduct.html http://www.vodafone.com/content/index/about/suppliers/supplier-ethics.html http://www.vodafone.com/sustainability/report2016 http://www.vodafone.com/content/dam/group/suppliers/downloads/VPC_Supplier%20Policy_A2_Code_of_%20Ethical_Purchasing_%28V3.0%29.pdf supplier with whom we have a direct contractual relationship (a Tier 1 supplier) in turn bears the responsibility for ensuring compliance across their own direct supply chain (a Tier 2 supplier from Vodafone’s perspective) and so on.