NSI Technical Bulletin No. 0004 provides guidance on implementing BS 8473:2006, the British Standard Code of Practice for intruder and hold-up alarm systems, focusing on the management of false alarms. The document outlines mandatory compliance for organizations seeking NSI approval, detailing key changes from the previous standard, including the appointment of a Systems Performance Manager and the categorization of alarm conditions. It emphasizes the importance of reducing false alarms to minimize resource waste for police and alarm companies, while also providing specific guidelines for system design, training, and documentation. Manual review is recommended for complete details.