Key security documents may be revised by the end of the year. These revisions could include a mention of nuclear-powered submarines, potentially identifying them as a subject.

Further details about the possible revisions are available from the source. The information provided does not specify the current content of the security documents or the exact nature of the revisions.

The source reports that the revisions may be made by year-end, but does not provide additional context or information about the implications of including nuclear-powered submarines in the documents.