As defined in Executive Order 12866 (as further amended, § 3(h)), a guidance document disseminated to regulated entities or the general public that may reasonably be anticipated to:
-- Lead to an annual effect on the economy of $100 million or more or adversely affect in a material way the economy, a sector of the economy, productivity, competition, jobs, the environment, public health or safety, or State, local, or tribal governments or communities;
-- Create a serious inconsistency or otherwise interfere with an action taken or planned by another agency;
-- Materially alter the budgetary impact of entitlements, grants, user fees, or loan programs or the rights and obligations of recipients thereof; or
-- Raise novel legal or policy issues arising out of legal mandates, the President's priorities, or the principles set forth in Executive Order 12866, as further amended.
Section I(3)(b) of the Bulletin explains what this definition of "significant guidance documents" excludes. (U.S. Office of Management and Budget. Section I(4), "Final Bulletin for Agency Good Guidance Practices". January 18, 2007.)