The identification emblem, Figure 1, shall consist of a fluorescent yellow-orange triangle with a dark, red reflective border. The yellow-orange fluorescent triangle is for daylight identification. The reflective border defines the shape of the fluorescent color in daylight and becomes a hollow red triangle in the path of motor vehicle headlights at night. The emblem may be permanently mounted or portable.

Source

The provisions of this § 165.4 amended July 21, 1978, effective July 22, 1978, 8 Pa.B. 2076.