exceptionally grave damage to the national security, such as the following: An armed attack against the United States or its Allies The compromise of military or defense plans, intelligence   operations,   or   scientific   or technological  developments  vital  to  the  national defense Disruption of foreign relations vitally affecting the national security SECRET Secret   is   the   designation   applied   only   to information the unauthorized disclosure of which could reasonably be expected to cause serious damage to the national security, such as the following: Jeopardizing  the  international  relations  of  the United States Endangering the effectiveness of a program or policy of vital importance to the national defense Compromising  important  military  or  defense plans,   or   scientific   or   technological developments important to national security Revealing important intelligence operations CONFIDENTIAL Confidential is the designation applied only to information the unauthorized disclosure of which could reasonably be expected to cause identifiable damage to the national security, such as the following: Information that reveals strength of our land, air, or naval forces in the United States and overseas areas Documents  and  manuals  containing  technical information used for training, maintenance, and inspection of classified munitions of war Research,   development,   production,   and procurement of munitions of war MARKING Classified material will be physically marked, annotated, or identified by means as prescribed in this section. The purpose of marking classified material is to inform the holder of the classification level and the degree   of   protection   required,   and   to   assist   in extracting,   paraphrasing,   and   downgrading   and declassification  actions.  Therefore,  all  classified material must be marked in a manner that leaves no doubt about the level of classification assigned to the material. Marking   Requirenents Marking requirements and the application of the markings vary depending on the kind of material. The following markings are required for all classified material: Originally  classified  material The identity of the original classification authority The agency or office of origin Declassification  date The  overall  classification Any  downgrading  instructions Derivatively  classified  material The source of classification The agency and office of origin The  overall  classification Declassification  date Downgrading  actions Publication   Markings The basic markings will be placed on the front of the publication. The overall classification will be placed at the top and bottom center of the front cover, title   page,   and   first   page.   Downgrading   and declassification instructions appear only on the face of the  publication. A back cover is not required; if used, the overall classification is placed at the top and bottom center. The  classification  of  each  interior  page  (except blank pages) of a publication will be marked at the top and bottom center of the page. Normally, the overall classification of the publication is used. The marking of each interior page with the highest classification it contains, to include UNCLASSIFIED, is permissible. When marked in this manner, and the page is printed on the front and back, both sides of the page must be marked with the highest classification of either side. When  one  side  contains  information  of  a  lower classification  than  the  marking  applied,  a  statement 11-3