Where can you find a listing of specific information elements for classification?

The correct choice is found in the Security Classification Guide (SCG). An SCG is an official document that delineates the specific criteria and elements of information that must be classified and at what classification level. It provides clear guidance to personnel on how to handle information based on its sensitivity and the potential impact of unauthorized disclosure. This makes the SCG a vital resource for ensuring consistent and accurate derivative classification, as it helps staff identify classified information and understand the rationale behind its classification.

Agency policy documents may provide broader policies or procedures regarding classification but do not typically contain specific information elements for classification. Internal memos can serve to communicate important information but lack the comprehensive detail found in an SCG. Likewise, colleague's notes, while possibly helpful in informal contexts, do not offer the authoritative or structured information necessary for proper classification practices. Thus, relying on the SCG ensures compliance with established standards and regulations in the classification process.