| 2.1. | The illuminating surfaces of retro-reflective devices in Classes IIIA and IIIB must have the shape or an equilateral triangle. If the word "TOP" is inscribed in one corner, the apex of that corner must be directed upwards. | a0c0 |
| 2.1. | The illuminating surfaces of retro-reflective devices in Classes IIIA and IIIB must have the shape or an equilateral triangle. If the word "TOP" is inscribed in one corner, the apex of that corner must be directed upwards. | a0c0 |