Yeah they might still blackout stuff

Probably

Depending on the time between the information release …. Sensitive information typically doesn’t outweigh public knowledge as historical information. Ima little high and it’s been awhile. But does that make sense?

Yes there were some conditions. For example if it will have an impact on ongoing operations or foreign relations it could be omitted.

The second caveat provides a lot of flexibility around what is released.

Interesting question. Had to look it up because it made me curious. Found this:

https://www.archives.gov/declassification/iscap/redaction-codes.html

I bet they extremely use the black highligters...