Code of Federal Regulations Title 22. Foreign Relations § 22.313.2 Guidance documents;  required elements

(a) Comply with all relevant statutes and regulation;

(b) Identify or include for each guidance document:

(c) Avoid use of mandatory language, such as “shall,” “must,” “required,” or “requirement,” unless the language is describing an established statutory or regulatory requirement or is addressed to Agency's staff and will not foreclose the Agency's consideration of positions advanced by affected private parties;

(d) Be written in plain, understandable English;  and

(e) Clearly and prominently state that the contents of the document do not have the force and effect of law and are not meant to bind the public, and the document is intended only to provide clarity to the public regarding existing requirements under the law or Agency policies.