If you claim to be fair trade or ethical, show it. Make your standard publically available, show what you are working towards and what you hope to achieve. If you claim a certification, prove it. Suppliers don’t necessarily have to be listed but companies should supply enough information to validate their claims.
At the moment, standards around transparency only shows up in the WTFO. The ETI has talked about transparency by advocating for supplier lists. Since the ILO’s standards are directed at states and not companies, this type of transparency would not exist in their principles.
“You provide transparent and well-founded information on your Fair Trade activities, including supply chains or membership requirements, to your trading partners and the public (as appropriate).