The document is a Technical Bulletin from the National Security Inspectorate announcing the publication of NCP 109 Issue 3, which outlines the Code of Practice for the design, installation, commissioning, and maintenance of access control systems. It highlights extensive changes from Issue 2, including the restructuring of sections and the introduction of new terms and requirements, particularly regarding risk assessment and cybersecurity. Approved companies must comply with the new standards by May 31, 2022, while new applicants will be audited against these standards immediately. Manual review is recommended for complete details on specific changes and requirements.