What must be in place for a safe to be considered approved?

For a safe to be considered approved, it must have a burglary rating and include a relocking device. A burglary rating signifies that the safe has undergone testing to withstand various forced-entry methods, providing assurance that it is capable of protecting its contents against theft. The inclusion of a relocking device enhances the safety further by adding a layer of security; if an attempt is made to tamper with the lock, the relocking device engages, making unauthorized access much more difficult.

This specification is crucial for environments where controlled substances or confidential information are stored, ensuring compliance with regulatory standards. The other options either do not meet the essential requirements for security or would compromise the safety and integrity expected from approved storage solutions.