Document the window film installation as soon as a problem appears. Before release, check whether the glass type, the light-transmission requirement, and the installation edges support one another, since no single requirement alone settles the question. Light-transmission requirements and glass certification conditions for window film installation in the destination country follow local competent-authority rules, licensed-body review, and the applicable contract terms. For the surrounding procurement steps on window film installation, see this related vehicle-import guide. Before shipping resumes, someone who took no part in the original work should review the window film acceptance sheet. For a review of the evidence needed for window film installation, send the destination, model, and volume through WhatsApp.