The document is a technical bulletin from the National Security Inspectorate (NSI) regarding the publication of BS 7984-3:2020, which outlines the code of practice for mobile security services, specifically keyholding and response services. Effective immediately, new applicant companies will be audited against this standard, while existing approved companies must comply by March 31, 2021. The bulletin highlights significant changes from the previous standard, BS 7499, including updated definitions, requirements for automated systems, and enhanced training and welfare checks for mobile patrol officers. Manual review may be needed for complete details on the implementation and specific changes.