Interpretive guidance is a non-binding explanation from a regulator, authority, or standards body that helps organizations understand how to apply a law or rule in practice. It does not replace the underlying legal duty, but it shows how the duty is expected to be read, documented, and enforced. In cybersecurity, this matters because many requirements are principle-based: they say what must be achieved, but not every control detail.
For defenders, interpretive guidance shapes policies, vendor-risk reviews, and audit evidence. It can clarify whether a supplier needs stronger controls, what “reasonable” security looks like, or how proportionality should be applied to different assets. In attacks, weak or vague interpretation can leave gaps: an organization may believe it is compliant while missing practical controls, such as supplier access restrictions, logging, or review cycles. Used well, guidance helps turn legal language into measurable security operations.