India's attempt to classify its documents : Classified vs Declassified

According to the Departmental Security Instructions laid down by the Office Manual for functioning of governmental department, there are four types of security classifications: Top Secret, Secret, Confidential and Personal (not for publication).

1. The ‘Top Secret’ grading is reserved for papers that include references to current or future military operations, intending movements or disposition of armed forces, shaping of secret methods of wars, matters of high international and internal political policy or reports derived from secret sources of intelligence.
2. The ‘Secret’ grade is given to documents that can potentially cause administrative embarrassment or injure the interest and prestige of the government, or prove to be an advantage to a foreign country or an enemy.
3. Documents are marked as ‘Confidential’ when they contain information that may not be harmful to national security but their disclosure may be deemed as prejudicial to the interests of the nation.
4. ‘Personal’ documents are those that are meant for public information but not publication.

Classified documents are supposed to be kept in files or in a bound book with security markings as per the designated grade. For example, all the pages of a Top Secret document are marked with a ‘TOP SECRET’ sign on the top and bottom of each sheet.

The rulebook known as the Manual of Departmental Security Instructions – notified by the Union ministry of Home Affairs in 1966 and followed by government departments for these decisions – is a confidential document that remains mysteriously inaccessible to the public.

https://in.news.yahoo.com/for-your-eyes-only--and-yours--a. nd-yours--and-yours-061853080.html