What briefing must newly cleared individuals receive before they are allowed access to classified information?

Newly cleared individuals must receive a security briefing that covers the classification levels of information, the proper handling and safeguarding of classified materials, and the consequences of unauthorized disclosure. They are also informed about reporting procedures for security incidents and the importance of adhering to security protocols. Additionally, the briefing may include an overview of relevant laws and regulations governing classified information. This ensures that individuals understand their responsibilities and the potential implications of mishandling classified data.