Animated sign means a sign which induces motion or rotation of any part by mechanical, or artificial means, or subdued color changes. An animated sign is not an EMC sign.
Railroad sign or signal means any sign, signal, or device erected by authority of a public body or official or by a railroad and intended to give notice of the presence of railroad tracks or the approach of a railroad train.
Illuminated sign means a sign with an artificial light source incorporated internally or externally for the purpose of illuminating the sign.
Unauthorized signature means a signature made without actual, implied, or apparent authority. The term includes a forgery.
Load Signalling Equipment means the equipment (which may include, but is not limited to, ripple injection plant) for the purpose of sending control signals to Load Control Equipment;