Two-part Security Ratings introduced. These were formed from:

• The tool category used (i.e. A to H)
• The minimum delay achieved in minutes (i.e. 1, 3, 5, 10, 15 or 20)
• Example: A “D5” Security Rating indicates a product resists entry by a single attacker using Category D tools for at least 5 minutes.

Previous Security Ratings were retained as an option to support regulations and specifications in which those ratings were referenced.