NSI Technical Bulletin No. 0019 provides guidance on implementing BS 7872: 2011, which outlines standards for manned security services related to cash and valuables in transit (CVIT). The bulletin details mandatory compliance requirements for NSI-approved companies, including new documentation, operational procedures, and employee training protocols. Companies must address any identified Improvement Needs by August 31, 2012, to maintain their NSI approval status, with specific emphasis on updated security measures and adherence to current legislation. Manual review is recommended for complete details on the changes and requirements.