After consultation with the industry the new rules have moved to a principle-based approach, allowing for more flexibility to deal with new and changing developments in circulation and verification. We have also harmonised common names and definitions across sectors.

Each rule is outlined by a simple definition first, underpinned by its principles and then followed by more detailed requirements. Separate guidance notes provide common examples and applications of achieving the requirements.

The rule-books are now available in two versions; the full version and an executive summary which highlights the definitions and principles, ideal for those who don't need a detailed understanding of the requirements.