What does the back door policy stipulate regarding its usage?

The back door policy emphasizes safety and security within the establishment, which is why it mandates that the door must be locked at all times. This measure helps to prevent unauthorized access and ensures that only designated individuals can enter or exit through that entrance. Keeping the door locked enhances the overall security of the venue, protecting both staff and customers.

Secure access points are crucial in managing risks and maintaining a safe environment. The other options suggest scenarios that could compromise security; for example, having the door unlocked at all times would create opportunities for unauthorized entries, while allowing free usage after dark could lead to safety issues. Therefore, the requirement to keep the door locked aligns with best practices for safety and security management.