from training.npr.org: https://training.npr.org/2015/04/07/npr-ethics-handbook/
NPR Ethics Handbook
The NPR Ethics Handbook is designed to help our journalists make thoughtful, principled decisions. It is not a series of commandments. Instead, it offers frameworks and guidance. It is also a “living” document. While our core principles do not change, we review and adjust our thinking as issues arise. The Handbook is designed to accommodate such changes.
At ethics.npr.org you’ll also find “Memmos” – occasional notes about the issues journalists encounter and the way NPR handles them.
Mark Memmott was NPR’s Standards & Practices Editor.