When a company is awarded its first classified contract, which form provides specific guidance about what information is classified?

The correct form providing specific guidance about what information is classified when a company receives its first classified contract is the DD Form 254, Department of Defense Contract Security Classification Specification. This form is crucial as it outlines the security requirements and classification levels applicable to the contract, detailing what information must be handled in accordance with specific security protocols.

The DD Form 254 serves as a critical communication tool between the government and the contractor, ensuring that both parties understand what constitutes classified information under the contract, how it should be marked, and the associated safeguarding and dissemination requirements. By specifying the classification requirements, the DD Form 254 helps to protect sensitive national security information and ensures compliance with federal regulations governing classified information handling.

The other forms mentioned, such as the SF 86, Personnel Security Questionnaire, and the SF 312, Classified Information Non-Disclosure Agreement, serve different purposes related to personnel security and non-disclosure commitments, but they do not provide the specific guidance on classification associated with a contract. Additionally, the DD Form 1391 is intended for military construction project data and is unrelated to classified contract information.