Before a volume purchase, verify the warning device installation method on a small number of real vehicles first. Check the device purpose, the mounting method, and the local permit item by item, then have a second reviewer test whether the conclusions can be reproduced. Permit conditions and certification requirements for warning device installation in the destination country follow local competent-authority rules, licensed-body review, and the applicable contract terms. This import vehicle acceptance guide can also be used on first batches handling warning device installation.