Md. Code, Public Safety § 12–705

(a) In this section, “lockout tag” means a tag that:

(1) seals a knife blade disconnect switch box closed;

(2) is attached to the exterior of the knife blade disconnect switch box with a metal or plastic strap; and

(3) 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.

(b) A company that installs solar photovoltaic systems shall install a lockout tag at each residential installation at the time of installation.