The following types of publications are excluded from the requirements of this Subpart:

(a) Internal documents required for administrative or operational purposes that have no public interest, educational, scientific, or research value;

(b) Classified publications and material otherwise marked prohibiting unauthorized disclosure;

(c) Tentative drafts such as preliminary planning reports that will appear later in revised or final form;

(d) Journal and magazine articles; or

(e) Disclosure materials containing any description, specification, data, plan, or drawing of any unpatented invention upon which a patent application is likely to be filed, unless an opinion by the SOL, or his/her duly authorized designee, has been rendered which finds that the interests of the Government will not be prejudiced by disclosure of such materials.