In this section, “lockout tag” means a tag that: seals a knife blade disconnect switch box closed; is attached to the exterior of the knife blade disconnect switch box with a metal or plastic strap; and includes a safety warning about the potential for electrocution if an individual removes the lockout tag or touches the contents of the knife blade disconnect switch box. A company that installs solar photovoltaic systems shall install a lockout tag at each residential installation at the time of installation.