The term "publicity or propaganda" is a term of art found in the omnibus appropriations bill passed by Congress every year: “No part of any appropriation . . .
Covert propaganda refers to media materials prepared by a government agency and then disseminated by a non-government outlet with the source undisclosed. What defines covert propaganda materials is that they are “misleading as to their origin.” The source must be intentionally misleading, however, and not just due to administrative carelessness. The agency in question must desire that its authorship be obscured, and it must take steps to ensure that obscurity.