What makes a code of conduct effective? For Triodos Bank, it's not about rules on paper, but about creating a lasting culture where ethical behaviour is the norm. In 2023, the bank developed a new code of conduct with an ambitious mission: to strengthen ethical conduct at all levels of the organisation, in all five countries where the bank operates. But how do you implement code in a way that is not only sustainable, but also inspires and connects people? Triodos asked Summiteers to come up with an approach. We linked the code to a wide range of ongoing initiatives to strengthen what was already there. In addition, we developed new initiatives around urgent themes in the code that were not covered by the existing one. Triodos took control of the execution. The programme coordinator was uniquely positioned to involve a rich group of ambassadors within the organisation and develop great ideas. Summiteers coached with tight programme management and professional development for maximum impact.