What is a fundamental principle of derivative classification?

The fundamental principle of derivative classification revolves around the consistent application of classification markings. When you are creating new documents based on existing classified information, it is essential to follow the classification level of the original source material. This ensures that sensitive information remains protected and that all documents are marked appropriately according to the classification guidance provided.

By marking new documents consistently with the classification of the source material, you uphold the integrity of the classification system and reduce the risk of unauthorized disclosure of sensitive information. This practice is crucial in maintaining the security of classified information and ensuring compliance with classification policies.

The other choices do not align with the principles of derivative classification. For instance, keeping documents unscientific does not relate to classification practices, nor does classifying based solely on personal judgement adhere to the established standards necessary for derivative classification. Avoiding the use of specific source documents is contrary to the practice, as derivative classification relies on the appropriate use of source materials to derive new classifications.